#3581B8 Hex Color
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The hex code #3581b8 identifies a cool, moderately muted blue with a clean, slightly gray cast. Its controlled saturation supports trust and reliability without feeling severe, making it useful for finance, healthcare, technology, and government branding. Use it as a supporting color or UI surface with dark text, which provides about 5.0:1 contrast for WCAG AA body text.
Questions about #3581b8
What is #3581b8 in RGB, HSL and CMYK?
In RGB, #3581b8 is rgb(53, 129, 184), in HSL hsl(205, 55%, 46%) and in CMYK 71%, 30%, 0%, 28%.
What colors pair well with #3581b8?
Pair #3581b8 with white or charcoal for clean contrast, then add a warm orange or muted gold accent to balance its cool blue base in interfaces, brand systems, and editorial layouts. Lighter tints work well for backgrounds.
Is #3581b8 readable on white or black?
#3581b8 has a 4.21:1 contrast ratio on white and 4.98:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works only for large text (24px, or 18.5px bold) and on black it works for body text. Try other pairs in the contrast checker.