#333B66 Hex Color
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#333b66 is a dark, muted indigo with cool blue-violet undertones. Its low saturation gives it a matte, dusty quality that feels serious, reflective, and structured. Use it as a dominant background or supporting tone in corporate, spiritual, and night-sky designs. The hex code #333b66 supports clear white body text at about 10.7:1 contrast.
Questions about #333b66
What is #333b66 in RGB, HSL and CMYK?
In RGB, #333b66 is rgb(51, 59, 102), in HSL hsl(231, 33%, 30%) and in CMYK 50%, 42%, 0%, 60%.
What colors pair well with #333b66?
#333b66 pairs well with burgundy, muted copper, and soft gray because their warmer or lighter tones bring structure without making the palette feel stark. Use those accents sparingly, especially when the indigo serves as the dominant background.
Is #333b66 readable on white or black?
#333b66 has a 10.72:1 contrast ratio on white and 1.95:1 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.