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Color templates tend to be sorted into three categories:
Color templates ending in "light" are often used as the main background in templates with multiple backgrounds to indicate subheadings.
Color templates ending in "dark" are often used as borders or font colors.
Color templates with neither are intended to be the general color for a subject. They are used as subheaders and as backgrounds in simple templates that only have one background. (such as in listing a move's type)