色彩三要素的对比运用共32页文档
色彩三要素ppt课件
• 对比色相距120° • 互补色相距180° • 类似色相距90°
病原体侵入机体，消弱机体防御机能 ，破坏 机体内 环境的 相对稳 定性， 且在一 定部位 生长繁 殖，引 起不同 程度的 病理生 理过程
3、纯度
纯度又称饱和度或是彩度，就是指色相的鲜艳程度。通常是以 纯色在某色中所占比例的大小来判断彩度的高低，纯色比例大的彩 度高，纯色比例小的彩度低，可见光谱中的各色单色光是最饱和的 彩色。当一种色彩与白色混合时，明度得以提高，但也会降低纯度 ，同样，当某种颜色与黑色混合时，明度和纯度都会减弱。
纯 色 加 黑
病原体侵入机体，消弱机体防御机能 ，破坏 机体内 环境的 相对稳 定性， 且在一 定部位 生长繁 殖，引 起不同 程度的 病理生 理过程
1、色相
色相是眼睛对可见光中的每种波长范围的视觉反应，也就是指色彩
相貌的特征倾向，这种特征倾向是识别不同色彩的主要依据，如一般的 色彩称谓如红、黄、蓝等等。
如果要改变一种颜色的色相，可以将该种颜色与其它颜色相混。根
病原体侵入机体，消弱机体防御机能 ，破坏 机体内 环境的 相对稳 定性， 且在一 定部位 生长繁 殖，引 起不同 程度的 病理生 理过程
• 色彩的分类 色彩从外表特征，是没有色彩倾向的中性色，它们只有明暗的变化。光谱与 色谱中的所有色彩称为有色彩，包括它们与黑、白、灰之间混合出 来的色彩，是具有色彩倾向的颜色。另外，一些特殊的色彩如：金 色、银色、和荧光色可以和有色彩混合出更多丰富的色彩。
• 4、中性色间隔调和法。色彩中黑、白、灰称为中性色，它们可以和任 何色彩调和。在并置的几色中，用中性色隔离，可以达到和谐。
色彩的对比构成同时对比连续对比三要
第四章 色彩的对比构成
低长调：低调的强对比效果。 具有强烈的、暴发性的、深 沉的、压抑的、苦 闷的感觉。
低中调：低调的中对比效果。 朴素、厚重、有力度，设计 中常被认为是男性色调。
3.纯度对比
色彩之间因鲜浊程度差别 而形成的对比叫纯度对比。 纯度对比较之明度对比、 色相对比更柔和、更含蓄， 1个阶段差的明度对比的清 晰度等于3个阶段差的纯度 对比，所以说纯度对比的 作用是潜在的，其特点是 增强用色的鲜艳感，即增 强色相的明确性。
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第四章 色彩的对比构成
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第四章 色彩的对比构成
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第四章 色彩的对比构成
高长调:此调明暗反差大， 对比强，形象清晰度高。有 积极、活泼、刺激、明快之 感。 高中调:以高调色为主的中 强度对比，效果明亮、愉快。 高短调:高调的弱对比效果， 形象分辨力差。其特点淡雅、 柔和、高贵、软弱，设计中 常被用来作为女性色彩。
第四章 色彩的对比构成
一、同时对比 二、连续对比 三、三要素对比
第四章 色彩的对比构成
一、同时对比
同时对比指的是在同一时间 下色彩并置的对比效果，它 产生于这样的事实：看到任 何一种特定的色彩，眼睛都 会同时要求它的补色，如果 补色还没有出现，眼睛就会 自动将它产生出来。这种色 彩效果是作为一种感觉发生 在观者的眼睛中的，并非是 客观存在的事实。
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第四章 色彩的对比构成
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第四章 色彩的对比构成
2.明度对比 色彩之间因明暗程度差别而 形成的对比，称之为明度对 比。 明度对比是色彩构成中最重 要的因素，是色彩三要素的 中心，色彩的层次与空间关 系主要依靠色彩的明度对比 来表现。只要发生色彩现象， 明度的差异和对比可以说是 无处不在。
色彩的三要素
产品设计师需要考虑产品材质对色彩的影响，选择适合的 色彩和表面处理工艺，使产品的色彩与整体设计风格相协 调。
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总结与展望
回顾本次项目成果
01
完成了对色彩三要素（ 色相、明度、饱和度） 的深入研究和分析。
02
建立了色彩三要素的数 学模型，实现了对色彩 的定量描述和计算。
03
开发了基于色彩三要素 的色彩匹配算法，提高 了色彩匹配的准确性和 效率。
05
色彩三要素在设计中应用
平面设计中应用实例
01
色彩搭配
在平面设计中，利用色彩的明度、色相和饱和度进行搭配，可以创造出
丰富的视觉效果，吸引观众的注意力。
02
突出主题
通过调整色彩的对比度和饱和度，可以使设计作品的主题更加突出，增
强视觉冲击力。
03
营造氛围
不同的色彩可以传达不同的情感氛围，如红色代表热情、活力，蓝色代
营造出和谐统一的氛围。
对比色搭配
选择色相环上相对的颜色进行 搭配，如红与绿、黄与紫等， 形成强烈的对比效果，引人注 目。
类似色搭配
选择色相环上相近的颜色进行 搭配，如红与红橙、黄与黄绿 等，营造出柔和协调的色彩效 果。
互补色搭配
选择色相环上互为补色的颜色 进行搭配，如红与青绿、黄与 蓝紫等，形成鲜明的对比和互
色彩分类
色彩可分为无彩色和有彩色两大类。无彩色是指黑、白、灰三种颜色，有彩色 则是指红、橙、黄、绿、青、蓝、紫等带有不同色相、明度和饱和度的颜色。
色彩属性及特点
要点一
色相
色相是指色彩的相貌，是区别色彩种类的名称。它是色彩 最基本的特征，是一种色彩区别于另一种色彩的最主要的 因素。
要点二
色彩的三要素：-明度、色相、彩度
色彩的三要素：明度、色相、彩度。
明度：表示色所具有的亮度和暗度被称为明度。
计算明度的基准是灰度测试卡。
黑色为0，白色为10，在0—10之间等间隔的排列为9个阶段。
色彩可以分为有彩色和无彩色，但后者仍然存在着明度。
作为有彩色，每种色各自的亮度、暗度在灰度测试卡上都具有相应的位置值。
彩度高的色对明度有很大的影响，不太容易辨别。
在明亮的地方鉴别色的明度比较容易模糊。
色相：色彩是由于物体上的物理性的光反射到人眼视神经上所产生的感觉。
色的不同是由光的波长的长短差别所决定的。
作为色相，指的是这些不同波长的色的情况。
波长最长的是红色，最短的是紫色。
把红、黄、绿、蓝、紫和处在它们各自之间的黄红、黄绿、蓝绿、蓝紫、红紫这5种中间色——共计10种色作为色相环。
在色相环上排列的色是纯度高的色，被称为纯色。
这些色在环上的位置是根据视觉和感觉的相等间隔来进行安排的。
用类似这样的方法还可以再分出差别细微的多种色来。
在色相环上，与环中心对称，并在180度的位置两端的色被称为互补色。
彩度（饱和度）：用数值表示色的鲜艳或鲜明的程度称之为彩度。
有彩色的各种色都具有彩度值，无彩色的色的彩度值为0，对于有彩色的色的彩度（纯度）的高低，区别方法是根据这种色中含灰色的程度来计算的。
彩度由于色相的不同而不同，而且即使是相同的色相，因为明度的不同，彩度也会随之变化的。
色彩模式：RGB模式：如图<1>就是按照自然界里三种基本色混合的原理而做的一种模式。
就是red（红）、green （绿）、blue（蓝）混合，通过三种基本颜色亮度值从0~255不同产生出其他各种颜色，这种模式叫加色模式。
为什么叫加色模式呢，举个例子好了，我们通常使用的电视屏幕和电脑屏幕上的显示就是这样的模式，在没有图象时，屏幕是黑的，若R，G，B三色亮度都为255时混合叠加打在屏幕上时则显示成白色。
就是加起来是白色的意思，叫加色模式。
CMYK模式：如图<2>这是种印刷模式，是用Cyan（青色）、Megenta（品红），Yellow（黄）、Black（黑）四种颜色混合，其实就是四种颜色的油墨混合，印刷当然是使用油墨了。
服装色彩学
2.花色面料应用 花色面料的应用，通常有以下三方面特点： （1）花色面料效果活泼
（2）花色面料要少用装饰
（3）花色面料要对条 冷暖对比，就是色彩冷暖感觉的差 异对比。
（1）便于色彩归类组合 可把所有色彩划分为三大类：冷色系、 暖色系和中性色系。搭配时，就把冷色与冷 色、暖色与暖色进行组合，如湖蓝、青莲、 玫瑰红；朱红、深黄。 （2）便于调节色彩关系 同色相的组合，如果感到过于平淡，可以 调整一下冷暖关系。如蓝色与红色的搭配， 如果强调冷调，可用湖蓝与桃红或玫瑰红； 如果突出暖凋，可选群青与大红或土红。 （3）便于区分色彩差异 色彩虽有大体的冷暖分类，但同一色相 的冷暖倾向的差异还是不容忽视的。同样是 灰色或绿色，就有倾向黄、倾向蓝、倾向红。 倾向白等。
3.纯度对比 纯度对比，就是色彩的纯净程度 （也称含灰度）的对比。 （1）纯度弱对比——具有含浑、柔 弱、易脏灰的特点； （2）纯度中对比——具有温和、文 静、稳重的特点； （3）纯度强对比——具有鲜明、跳 跃、色彩感强的特点。
4.面积对比
面积对比，就是色彩在配色中所 占面积大小的对比。 服装色彩的搭配，在面积对比方 面，有以下三方面特点：
（三）服装局部配色
1.局部配色
局部配色，是与服饰配套相对 而言的，指的是上装、下装。内 衣、外衣的色彩搭配，也包括单 件服装的色彩组合。局部配色， 如果把花色视为一种色的话，多 以两色或三色的搭配为主，同时 也有单色，四色或更多色的组合。
服装局部配色主要 有以下几种，也有四 色或更多色的组合。 1.单色构成:指的是 一套服装都用一种面 料制作的一种色彩的 组合。如连衣裙。衬 衣和短裤、薄料套装 等，具有整体、简洁、 刻板的特点。
（1）要与款式造型一同构想，服装色彩不 能凭空想象，尤其是色彩面积的大小，要取 决于款式和造型上的设计。 （2）要避免面积相等的搭配，不同色彩的 搭配，最忌讳相互间的色块面积相等。色块 面积相等，色彩相互抵触，难以形成色彩的 主次，服装色调就会杂乱不清。 （3）要运用色彩的呼应和穿插，服饰品的 色彩若与服装色彩相同，尽管它们不处在一 起，也会起到增加色彩面积的作用。
色彩三要素和色彩的视觉效果
色彩三要素和色彩的视觉效果所谓的“色彩三要素”就是指分别和比较各种标准和尺度，即色相明度彩度，并把它们用来研究色彩的视觉效果。
（一）色相色相也称色别——不同色彩的原貌，它反映不同色彩各自具有的品格，并以各种色彩。
通常所说的红、橙、黄、绿、青、紫等色彩名称就是色相的符号。
世间万物，色彩缤纷，人们的肉眼所能识别的色相是很少的。
如何提高辫色力，事艺术领域的工作人员搞好设计创作至关重要，只有善于去比较，善于从大致相似彩中，发现其间的差别，如红色有朱红（红偏黄）、大红（红偏橙）、曙红（红偏紫）、深红（红偏青），绿色则有黄绿（绿偏黄）、青绿（绿偏青）等差别，它们的种种色差造成的环境给人的心理和生理上产生各种情调。
图3-1-2是以三原色为核的色环，包括三个原色、六个标准色以及介于这标准色之间的中间色，即红、橙、黄、绿、青、紫等以及红橙、橙黄、黄绿、青绿、青紫和红紫十二种颜色的物质色十二色相。
这十二色相以及由它们调合变化出来的大量颜色相，彩色。
图3-1-3为光色十二色相环，以及色彩中的黑、白二极色再加上介于黑白之间中灰色通称无彩色；金、银光泽耀眼，称为光泽色。
前面阐述的物体的颜色是要依靠光来显示，但光色与物质是不同的，光色的原色为红、绿、青混合之后近于白（图3-1-4）；物质色的原色为红、黄、青，混合之后近于黑，（二）明度明度，即色彩明暗的程度。
不同色相的明暗程度是不同的，如图3-1-6，光谱中的各种色彩，以黄色的明度为最高，由黄色向两端发展，明度逐渐减弱，以紫色的明度为最低，处于光谱的边缘；同一色相的色彩，由于受光强弱不一样，明度也不同，如同为绿色就有明绿、正绿、暗绿等区别。
同一面红旗，由于受光情况不同，静止的和迎风招展的红旗，就会产生浅红、淡红、深红、暗红、灰红等层次，则立显红旗的立体感。
图3-1-7 为色的明度的立体层次。
（三）彩度彩度又称纯度或饱和度，系指颜色的纯粹程度。
当色素量达到饱和程度时，该色彩的特性才能充分地被显示。
4.第二章色彩的属性纯度对比
4.第二章色彩的属性纯度对比2.色彩的三要素对比构成2.3纯度对比又称彩度､饱和度(IntensitySaturation)､艳度､即色的含灰(浊)程度或鲜艳(清)程度。
工艺设计系2.色彩的三要素对比构成2.3.1降低色彩纯度的四种方法加白:纯色混合白色,可以降低纯度,提高明度,同时也会因白色的混合使其色相的色性偏冷。
加黑:纯色混合黑色,在降低明度的同时也降低了色彩的纯度,所有色相都会因加入黑色后而失去原有的光彩,变得沉稳､幽暗。
加灰:纯色加入同等明度的灰色后,降低纯度而保持原来的明度,纯色的特征立即消失,色彩变得浑厚､含蓄,虽然不如原来活泼,但具有柔和､软弱和古朴､典雅之感。
加互补色:纯色混合相对应的补色,使鲜色变为浊色,因为一定比量说的互补色混合会产生灰色,相当于纯色混合无彩度灰色的效果。
工艺设计系2.色彩的三要素对比构成纯色混合白色纯色混合黑色工艺设计系2.色彩的三要素对比构成纯色混合灰色纯色混合补色工艺设计系2.色彩的三要素对比构成2.3.2纯度九级调建立在纯度因素差别基础上的色彩对比方式称为纯度对比,这一对比的强弱感取决于色的鲜艳与灰浊的差别程度。
在色立体中愈接近“球心轴”的色纯度愈低;反之,愈接近“赤道”外沿的色纯度愈高。
低纯度调区:灰感强而色相朦胧､暧昧､乏力;中纯度调区:有柔软､静谧､温和的色感;高纯度调区:包括鲜艳的纯色与略含灰味的艳色,鲜艳､明快､刺激而稳健。
纯度对比的强弱取决于色彩的纯度差别跨度的大小。
借助明度对比中的9等级分级概念,我们按色阶分为纯度弱对比､纯度中对比､纯度强对比。
工艺设计系2.色彩的三要素对比构成2.3.3纯度强对比是指纯度差间隔七~八级的对比,是低纯度色与高纯度色的配合,其中以纯色与无彩色黑､白､灰的对比最为强烈。
纯度强对比具有色感强､明确､刺激､生动､华丽的特点,有较强的色彩表现力。
色彩的模糊与生动是纯度对比所引起的,在大面积的纯色与小面积的灰色对比中,灰色会倾向于该纯色的补色,纯度对比越强,纯色的色感就越鲜明,灰色就越显柔和,画面效果就有明快,富有变化而统一之感。
色彩三要素及色彩对比(The three elements of color and color contrast)
色彩三要素及色彩对比（The three elements of color and colorcontrast）"The basic type of the contrast of hue.More than two kinds of colors, color contrast effect due to the formation of different hue called hue contrast. It is a fundamental aspect of color contrast, the contrast degree depends on the distance between the hue in the hue on the ring (angle), distance (angle) the smaller the contrast is weak and more strong contrast.1. zero contrast(1) no color contrast color contrast although colorless phase, but their combination with great value in practical. Such as black and white, black and gray, gray and light gray, or black and white and grey, black and dark gray and light gray etc.. Effect of contrast, feeling generous, solemn, elegant and modern, but also easy to produce too sober sense of monotony.(2) no color and contrast color such as black and red, grey and purple, or black and white with yellow, white and blue and grey. Effect of contrast feeling both elegant and lively, no color area, is elegant and dignified, color size lively sense of strengthening.(3) different brightness or different purity change compared to the same hue contrast a hue, commonly known as sister color combination. Such as blue and blue (blue and white) color contrast, orange and coffee (orange + grey or green) and powdergreen (green + white) and green (green + Black) color contrast. Effect of contrast feel unified, quiet, elegant, subtle, and stable, but also easy to produce defects of dull and stiff.(4) no color with the same colour as compared to white with dark blue and light blue, black and orange and brown contrast, the effect of the (2) and (3) types of advantages. You can have a certain level, and generous, lively and stable.2. harmonic contrast(1) compared to two to adjacent color contrast color hue central adjacent hue, a distance of about 30 degrees, for the weak contrast type. Such as orange and orange and yellow orange contrast etc.. The effect of feeling soft, harmonious, elegant, quiet, but also feel monotonous and boring, fuzzy, weakness, must be adjusted to enhance the effect of lightness difference.(2) a similar hue contrast hue contrast distance of about 60 degrees, for the weak contrast type, such as red and yellow orange contrast etc.. The effect is rich, lively, yet unified, elegant, harmonious feeling.(3) the difference in color than the color contrast relative to a distance of about 90 degrees, in contrast to the type, such as yellow and green contrast effect, bright, lively, full, exciting feeling, interest, are compared with the considerable efforts, but not disorder and sense.3. strong contrast(1) contrast color relative colorimetric relative distance of about 120 degrees, strong contrast type, such as yellow and purple red contrast etc.. The effect of strong, bold, strong, lively and rich, but also not easy to unity and sense of confusion, irritation, cause visual fatigue. The general need to adopt various means to improve the harmonic contrast effect.(2) contrast color hue contrast distance 180 degrees, extreme contrast type, such as red and blue green, yellow and blue purple contrast etc.. The effects of the strong, dazzling, loud, very powerful, but if handled properly, easy to produce immature, primitive, vulgar, unstable, uncoordinated and bad feelings.< > two basic types of brightness contrastMore than two kinds of color combination,Because of the color contrast effect of different brightness formed called brightness contrast. It is an important aspect of color contrast, color scheme is decided to feel bright, clear, dull, soft, strong, hazy and the key.The contrast depends on the color in the color brightness arithmetic series, usually 1 - 3 designated as low brightness area, 8 - 10 as 4 - 7 of Gaoming District, designated as in lightness area. (Figure) in the choice of color combination, when the base color and contrast color distance in 5 level and above, called long (strong) comparison, 3 - level 5 called in contrast, 1 - level 2 called short (weak) contrast. It can be divided into nine basic types of brightness contrast(1) high long tones such as 10:8:1, of which 10 were shallow base color, large area, 8 with light color, area is larger, 1 dark contrast color, the area should be small. The light and dark contrast, sensory stimulation, lively, active, lively, strong.(2) high school profile such as 10:8:5, the brightness contrast is moderate, the feeling is bright and pleasant, clear and bright, stability.(3) high short tones such as 10:8:7, the weak light and dark contrast, image resolution, feeling less pale, soft, elegant, noble, soft, hazy, feminine.(4) in long tones such as 4:6:10 or 7:6:1, the adjustable in lightness color tone, with color, compared with light or dark, feeling strong, steady, vivid masculine.(5) in regulating such as 4:6:8 or 7:6:3, the notes in contrast, feeling rich.(6) in the short tone such as 4:5:6, the adjustment for weak lightness contrast, subtle, flat, fuzzy feeling.(7) low long tones such as 1:3:10, the dark and strong contrast, feel magnificent, deep, alert, explosive.(8) low notes such as 1:3:6, the dark contrast medium, feel heavy, simple, conservative, male.(9) low short tones such as 1:3:4, the dark and weak contrast, dull, melancholy, loneliness, mystery, horror.In addition, there is a comparison of the strongest 1:10 the most long, strong feeling, simple, blunt and sharp glare, etc..< > three basic types of purity contrastMore than two kinds of color combinations, the color contrast effect of different purity formed called the purity of comparison. It is another important aspect of color contrast, but because of the more subtle, intrinsic, so it is easy to be. In the color design, the purity of comparison is gorgeous, elegant, decided tone feel simple, vulgar, implicit and not key.The contrast depends on the color distance in the color purity arithmetic, the longer the distance between the stronger and weaker contrast.If the gray to bright color is divided into 10 pure arithmetic series usually 1 - 3 classified as low purity, 8 - 10 designated as high purity, 4 - 7 as in pure region (Figure). In the choice of color combinations, when the base color and contrast color distance in 5 level and above, is called a strong contrast; 3 - level 5 - 1 called in contrast; Level 2 is called weak contrast. It can be divided into nine basic types of purity.(1) fresh stresses such as 10:8:1,The feeling is bright, vivid and lively, beautiful and strong.(2) fresh notes such as 10:8:5, feel more stimulation, more vivid.(3) fresh weak tone such as 10:8:7, because of the color purity are high, after the combined comparison each plays a role to resist, collision, feeling so harsh, vulgar, childish, primitive, hot. If the distance from each other, this effect will be more obvious and intense.(4) stressed that such as 4:6:10 or 7:5:1, feel appropriate and popular.(5) in regulating such as 4:6:8 or 7:6:3, feel the gentle, static and comfortable.(6) the weak regulation such as 4:5:6, flat, vague, monotonous feeling.(7) grey stressed such as 1:3:10, feeling generous, elegant and lively.(8) the grey tone such as 1:3:6, quiet, more generous, feeling each other.(9) grey stressed such as 1:3:4, feel elegant, delicate, beautiful, subtle, hazy, weak.In addition, there is a weak contrast color, such as white: black, dark gray, light gray, color purity due to the contrast is zero, so the feeling is very generous, dignified, elegant,simple.< four > position area and contrast colorAs the carrier of the visual form of color, always has a certain area, therefore, in this sense, the characteristics of the area is also an indispensable color. Although there are more suitable for color selection often in practice of art design, but because of the size, position control caused by improper fault conditions.The relationship between 1. color contrast and area(1) color combination, only the same area of the color can be compared to the actual difference, confrontation between each other, relatively strong contrast effect.(2) between the two sides of the same attribute, a large area, the area has advantages, and the other side to narrow the area, will weaken the color contrast.(3) the color property unchanged, as the area increases, to strengthen the visual stimulus strength, otherwise weakened. Therefore, a large area of contrast color can cause glare effect. As in the environmental art design, general building exterior wall, interior walls are used sophisticated, low purity of color, in order to reduce the contrast intensity caused by bright and comfortable effect.(4) large area color stability, in contrast, the color of illusion effect; on the contrary, the color illusion effect.(5) the same properties and the area of the color, and the shape of the accumulation and dispersion state relationship is its great stability, high degree of aggregation by its shape color effect, a high degree of attention, and vice versa. Such as outdoor advertising and posters, general colors are more concentrated, in order to achieve remarkable effect.The relationship between 2. color contrast and position(1) between the two sides of the color contrast effect is more closer, although, whereas the more weak.(2) a mutual contact, the starting state, the contrast effect is stronger.(3) all surrounded by another color, the strongest contrast effect.(4) in the work, usually will focus on color settings in the visual center, the most conspicuous. Such as the 4 intersection points of well shaped composition.< five > texture contrast colorThe properties of the material and the color and the image of an object surface texture is close, color feeling is the surface effect of tactile texture and visual feeling.(1) between the two sides of the color, such as the use of different texture of the material, then compare the effect oftemperament and more.(2) the same color or similar color matching, texture material changes can be used to compensate for the monotony of heterogeneity. If the same red roses printed on thin nylon sand windows and thick sofa fabric, which is composed of decorative effect, as in series, and the charm of color change of material.(3) painting and color performance, application of various pigments and painted out can produce different texture effects, such as painting, watercolor, gouache, acrylic and other colored pigments and crayons, McDonald's, pen, brush and other various types of brushes.(4) the same pigment with different ways to create many wonderful texture effects, to enhance the color of interest, feeling. Such as extension, cracked, and anti pull, and sprinkle, sprinkle, coating, coating, dye, hook, spray, tie, ice, brush, etc., including color technique.< > six successive contrast color(1) occurred within the same time, with a view of color contrast is called color and contrast. In this case, comparison and contrast, rejection and effect of color are interdependent. As in the yellow paper on a bit of gray, this feeling is stronger, the so-called color illusion. Another example of black paper coated with a grey white box, with the same area and shades of gray squares, and contrast visual feel is gray black paper more bright, forming a so-called lightness illusion.(2) color contrast occur at different time and different perspective, but also has fast time continuity, continuous natural numbers as color contrast.The human eye has the same look at the second color, second color illusion will happen. When the first look longer, the greater the effect. Second color illusion tend to have the complementary color before. This phenomenon is visual afterimage and visual physiological and psychological self balancing instincts. Such as the environment of operation room hospital surgery and medical and nursing staff work clothes are selection of blue and green, apparently in order to "and" blood red, a continuous contrast the clever use of color, the doctor looked at the blue green, not only can reduce fatigue, restore vision, but also easy to see the small blood vessels and nerves, thus to ensure the accuracy and safety of the operation.。