在自然界里，蕴涵着一个从自然现象中提取出来的，由色彩自身因素和逻辑所构成的色彩奇域。对色彩规律的认识和掌握，正是通向这个奇域的有效桥梁。色彩是绘画的重要语言和表现手段，色彩写生是体验这种语言和表现手段的方法，而色彩默画则是对色彩语言、表现手段以及写生经验的提升。
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