#3F406B Hex Color
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Dark and dusty, #3f406b is a muted indigo with a gray cast that keeps it understated. It reads as dim navy at a glance, which suits moody backgrounds, dark mode UI, and supporting tones in corporate palettes. White text hits about 9.7:1 contrast on it, so small body copy stays readable. Pair it with burgundy or brass for a richer look than the usual gray.
Questions about #3f406b
What is #3f406b in RGB, HSL and CMYK?
In RGB, #3f406b is rgb(63, 64, 107), in HSL hsl(239, 26%, 33%) and in CMYK 41%, 40%, 0%, 58%.
What colors pair well with #3f406b?
#3f406b flatters warm, earthy accents like burgundy, brass, and terracotta, which stop it from reading flat. Soft neutrals such as warm gray or cream also work when you need a calmer palette.
Is #3f406b good for text backgrounds?
Yes. White text on #3f406b reaches about 9.7:1 contrast, well above the 4.5:1 required for WCAG AA body text, so it works behind small copy in dark interfaces.
Is #3f406b readable on white or black?
#3f406b has a 9.73:1 contrast ratio on white and 2.15:1 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.