darker
adj.
黑暗的( dark的比较级 );
（颜色）深色的;
暗色的;
（皮肤、毛发等）棕黑的;
例句:
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I also let my hair go darker and grew out my fringe.
我还把头发颜色染深，并让刘海儿长长消失。
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U is a heavier, darker creation, however.
来自BBC
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There's frequently a darker side to the glitter.
来自BBC
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The days draw in and the mornings get darker.
天黑得越来越早，天亮得越来越晚。
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These were manifestations of the darker side of his character.
这些是他性格阴暗面的表现.
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The heart wood is...darker...than the soft or young wood.
来自J. C. Loudon