2.2 色彩的对比
色彩对比主要是指冷暖色的对比,色调分为冷色调和暖色调两大类。其中,红、橙、黄为暖色调,青、蓝、紫为冷色调,绿色不冷不暖为中间色调。色彩对比规律为:在冷色调的画面中,能够突出暖色主体;而在暖色调的环境中,冷色调则变为较醒目的主体。当然,色彩对比除了冷暖色对比外,还有饱和度对比、明度对比、色别对比。
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2.2.1 色相对比
色相对比是色相环中的任意两种或多种颜色放置在一起时,通过比较呈现出色相上的差异。根据色相对比的强弱可分为邻近色、对比色、互补色等,通过颜色相距的角度可以进行区分。在色相环上相差90°以内的为临近色对比,在120°~180°的是对比色对比,180°的是互补色对比。
在周围颜色的衬托下,该颜色会产生奇妙的色彩心理变化。换句话说,人们在视觉上看到的颜色会比实际偏红或偏蓝,这种现象源自人们心理的视觉本能,在视觉上会产生偏向周围颜色的心理补色。除此之外,对高纯度的色彩进行对比,其对比度也会增加。这都有利于人们识别色相差异,以满足人们不同的视觉要求。
任何色相都可以单独作为作品的主色。多种颜色之间的同类、近似、对比、互补色相对比会产生不同的视觉效果。
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1. 同类色相对比
同类色相对比是指同一色相里不同明度的对比,因此在色相对比时,同类色相对比会显得较为单纯、柔和、协调。无论色相是鲜明的还是暗淡的,整体风格都容易协调统一。通过简单地改变色相,就会使画面色调得以改观,与色相较强的颜色相结合,会给人一种高雅、文静的感觉,相反则会让人感觉单调、平淡。
![](https://epubservercos.yuewen.com/F86787/15253384405225106/epubprivate/OEBPS/Images/Figure-P25_3568.jpg?sign=1739692286-gpqDPyJj6ZruXFbYS2ytNoZMKypjhB0I-0-485dccf56880da129e9c5fd3ca346fb5)
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2. 临近色相对比
临近色相对比要比同类色相对比更加明显、丰富、活泼,补充了同类色相对比的不同,但相对来说就缺少了单纯、雅致、柔和等特点,当各种类型的色相对比放置在一起,同类色相和临近色相对比,都能保持各自明确的色相特征,带给人们更加鲜明的视觉效果。
![](https://epubservercos.yuewen.com/F86787/15253384405225106/epubprivate/OEBPS/Images/Figure-P26_3614.jpg?sign=1739692286-I0CXAp3CnIu9mpcY7pdkTd6X9Ovet9sF-0-8e143c2eade7dfcbca523222970407b5)
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3. 对比色相对比
对比色相对比相较于临近色相对比更加鲜明、强烈、饱满。会提高人们的兴奋度,然而也会造成视觉及精神上的疲劳。这类对比色相对比较复杂,很难做到色调上的统一。对比色相对比可以丰富画面,但过多的对比会产生过分的杂乱和刺激,使得画面显得较突兀。
![](https://epubservercos.yuewen.com/F86787/15253384405225106/epubprivate/OEBPS/Images/Figure-P26_3623.jpg?sign=1739692286-ZPbk8wjpJtpF2OUG2RZjIybjj3n5xSPZ-0-26ddac056fb7524b10db3341e18b04b8)
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4. 互补色相对比
互补色相对比可以产生强烈的刺激感,给人印象最为深刻。
![](https://epubservercos.yuewen.com/F86787/15253384405225106/epubprivate/OEBPS/Images/Figure-P27_3677.jpg?sign=1739692286-Z5Tf4gbJJp1oePfxu00gbLhSHWKgwFKT-0-e5bd36f6b02a631f5f1aeef565eb7860)
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2.2.2 明度对比
明度对比也称为黑白度对比,是指色彩的明暗程度上的对比。明度对比是色彩构成中较为重要的一环,可以突出展现页面中的层次、空间关系。若画面只有色相对比,则画面的层次不够鲜明,若画面只有纯度对比,则图案将难以辨认。
根据明度色标,可以把明度对比分为低调色、中调色及高调色,低调色的明度为零度到三度,中调色的明度为四度到六度,高调色的明度为七度到十度。而色彩明度中的差别,决定了对比的强弱。三度差以内的对比为短调对比,三度到五度内的差值为中调对比,五度以上的差值为长调对比。
如果在纯色中加入白色的色调效果则被称为高调色,如果在纯色中加入灰色所形成的色调则被称为中调色,如果在纯色中添加黑色所形成的色调则被称为低调色。
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2.2.3 纯度对比
纯度是指色彩的鲜艳程度、饱和度,纯度对比是指不同纯度的颜色之间的对比效果。色彩上的纯度变化,可以带来不同的视觉属性。
纯度对比的强弱可以根据色彩的纯度差别大小进行区分。纯度对比弱的画面给人的视觉效果比较弱,图像清晰度比较低,需要长时间、近距离地观看。纯度对比中等的画面给人视觉效果最为和谐,图像画面主次分明,呈现出的效果含蓄丰富。纯度对比强的画面则会出现下面这种情况,即鲜艳的颜色会更加鲜艳,暗浊的颜色更加暗浊,画面中对比鲜明,富有生机,色彩辨识度较高。
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