#21212A Hex Color
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#21212a is a dark indigo that sits a step away from charcoal. Its low saturation and deep lightness give it a gloomy, ashy feel, softened by a faint violet undertone. Treat it as a dominant base in dark mode interfaces, night sky themes, or moody brand palettes. White text reads clearly on it at about 16:1 contrast, and a warm gold accent keeps it from going flat.
Questions about #21212a
What is #21212a in RGB, HSL and CMYK?
In RGB, #21212a is rgb(33, 33, 42), in HSL hsl(240, 12%, 15%) and in CMYK 21%, 21%, 0%, 84%.
What colors pair well with #21212a?
Warm gold, dusty mauve, and muted terracotta all lift #21212a without fighting its low saturation. Cool grays tend to blend into it, so reach for warmer accents when you need separation.
Does #21212a work as a background color?
Yes. It is dark enough for large surfaces and gives white text a contrast ratio near 16:1, well above WCAG AA requirements for body text. Its faint violet cast keeps it softer than plain black.
Is #21212a readable on white or black?
#21212a has a 15.96:1 contrast ratio on white and 1.31:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works for body text and on black it is too faint for text. Try other pairs in the contrast checker.