#183B56 Hex Color
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#183b56 is a dark, muted blue with cool gray undertones and low saturation. Its weight suggests authority, reliability, and control, making it effective for finance, security, government, and corporate branding. Use it as a dominant UI or website background, then add warm burgundy accents. White text reaches about 11.7:1 contrast, supporting readable body copy. The hex code is #183b56.
Questions about #183b56
What is #183b56 in RGB, HSL and CMYK?
In RGB, #183b56 is rgb(24, 59, 86), in HSL hsl(206, 56%, 22%) and in CMYK 72%, 31%, 0%, 66%.
What colors pair well with #183b56?
Warm burgundy and muted neutrals pair well with #183b56, adding contrast without weakening its serious character; pale blue-gray or soft white can lighten interfaces and keep the palette readable across screens. A restrained warm accent works especially well.
Is #183b56 a warm or cool color?
#183b56 reads as a cool dark blue because its low saturation is tempered by gray undertones, giving it a reserved, controlled feel rather than a vivid, warm, or energetic one. It suits focused interfaces, security products, and formal brand systems.
Is #183b56 readable on white or black?
#183b56 has a 11.67:1 contrast ratio on white and 1.79:1 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.