The effects supported include desaturation and grayscale, inverting, flipping, brightness and contrast adjustment, hue and saturation, embossing, blurring and much more.
效果包括去饱和度，灰度级，反转，亮度，对比度调整，色调，饱和度调整，以及浮雕，虚化等效果。
2
These matrices may also be used to transform RGB colors, to scale RGB colors, and to control hue, saturation and contrast.
这些矩阵也可用于转换rgb颜色，规模RGB颜色，并控制色调，饱和度和对比度。
3
The new charcoal colour references the original hue of the building, which was painted dark to contrast with its lighter neighbours.