在决定构图之前，确定你的画面除颜色之外已经有很和谐的素描关系。
Before settling on your composition, make sure your piece is nicely balanced value-wise in addition to colour.
举例来说，纯粹的白光照射苹果，除红色外(波长700 - 630纳米)所有的颜色(所有波长)的光都会被吸收。
For example, if pure white light hits an apple, all colors (wavelengths of light) are absorbed except for red (700-630 nm).
红色颜料吸收白光中的除红色而外的所有颜色。
Red paint soaks up or absorbs all of the colors in white light except red.
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