The hue contrast effect found in this study followed the opponent-colour theory.

本文研究的色相对比效应符合对立颜色理论。

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Less important elements should be less saturated, have less value and hue contrast against the background, and should also be smaller, or indented.

与背景的颜色及其值的对比也不要太强烈，尺寸要小些或者向内缩进。

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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。

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That's because the lines in the notebook are printed using a unique dot pattern that helps Evernote identify the paper's exact dimensions and hue, so it can optimize contrast and correct skew.

WSJ: The Cloud, Writ Large

In contrast to the clear bullish hue in near-term call options, put activity in the June contract seems mixed.

FORBES: Petrohawk Bulls Stock Up On Calls, Speculators Flock To Dell, The Gap