When the mind is clear, a dark room has its blue sky.

头脑清醒时，暗室也自有蓝天。

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In addition, Xubuntu’s crisp dark-blue artwork is a clear departure from Ubuntu’s purple theme.

此外，Xubuntu的深蓝色主题也不同于Ubuntu的紫色主题。

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Situated at the foot of the nine picturesque peaks, the temple-mausoleum, its dark red walls intensified by a clear blue sky, presents a look of great solemnity and serenity.

舜帝陵庙，在风光秀丽的九峰环抱之中，蓝天白云衬托着深红色的殿墙，更显得高洁宁静，庄严肃穆。

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Not quite as long as Saxe has in developing something called SmartGlass, which changes from dark blue to almost clear with the turn of a knob.

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