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网站设计中的色彩设计—色彩的对比(二)
wumei2009-09-25 20:12:443．纯度对比
低纯度基调，易产生脏灰、含混、无力等弊病；
中纯度基调具有温和、柔软、沉静的特点；
高纯度基调具有强烈、鲜明、色相感强的特点。纯色相组成的基调为全纯度基调，是极强烈的配色；如果是对比色相的全纯度基调，则易产生眩目、杂乱和生硬的弊病。
纯度对比强弱决定于纯度差，如：纯度弱对比是纯度相差比较小，大约在3级以内；纯度中对比是纯度差间隔在4～6级的对比；纯度强对比是纯度差最大的对比，如高纯度色与接近无彩色系的对比，是大于6级的对比。色彩的模糊与生动的纯色对比，也就是用灰色去对比纯色，使纯色更加生动，但要注意色阶。
为了加强色彩的感染力，不一定依赖色相对比，有时一堆鲜艳的纯色堆在一起倒显得吵闹杂乱，相互排斥，有时相互削弱，只有跳跃、喧闹的效果，而无突出某一主色的效果。若想突出某一主色，自然要用降低辅色的纯度去衬托主色，这样主次分明，主题突出。
褐色和蓝色块中低纯度弱对比 黄色和橙色的高纯度弱对比
灰粉色黄色紫色的低纯度中对比 六种颜色的纯度强对比
背景黄色和橙色的高纯度弱对比 蓝红紫黄色块和灰蓝色块的高纯度强对比
4．冷暧对比
利用冷暖差别形成的色彩对比称为冷暖对比。
以冷色为主的色调可构成冷色基调，以暖色为主的色调可构成暖色基调,（占画面面积60%以上)。冷色基调给人的感觉寒冷、洁爽、理智、流动感、空间感等；暖色基调给人的感觉希望、热情、喜庆、浓郁、阳光感、迫近感等。
冷暖对比是相对而言的把绿色放在黄绿色中，绿色成为冷色；把绿色放在蓝色中，它就发暖。冷暖对比也有强弱之分，在冷暖属性球中越临近的颜色其冷暖对比就越弱，到达冷暖两极一一蓝色和橙色，则形成冷暖的最强对比。
无彩色中的黑白灰， 白色是冷色、黑色是暖色，所以在色块中混入白色会倾向冷，混入黑色会倾向暖如果往灰色中加暖色，则灰色会偏暖，我们称之为暖灰；往灰色中加冷色，则灰色会偏冷，我们称之为冷灰冷暖。灰是非常有个性、含箫、深沉、耐看的。它既可用作主色也可用作辅色，令人产生信任感和档次感。
冷暖对比能强有力地烘托主题气氛:我们常常在冷调或暖调的画面中施以小面积的暖调或冷调，使画面形成冷暖的对比。另外，利用暖色的前进、膨胀感和冷色的后退、收缩感能加强空间的表现力当然，在网站设计 中物象的受光部色彩偏暖时背光部的色彩往往偏冷，反之亦然。
这是两个冷暖前进后退的例子。上面的冷色调网站中，导航用暖色，形成了冷暖的对比，使导航有前进的感觉，而背景则后退了，使页面有了深度。在暖色调网站中，背景用了偏蓝的绿色，看起来使中间的暖色更靠近我们。
作者：freeren.org
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