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The background color is something that comes first when we discuss dark-themed screens. Contrast is necessary to separate visual elements and to create intelligible text. Google’s Material Design dark theme recommends using dark gray (# 121212) as the surface color. Negative space is the area of the layout that is left empty. It may be not only around the objects you place. Negative space will make a dark interface more readable and make it easier for people to assimilate information. Dark themes are more difficult to use because they contain predominantly dark surfaces with rare color accents.