#1F639B Hex Color
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#1f639b is a muted, desaturated blue with a serious, grounded personality. Because it lacks intense chroma, it avoids being loud, making it a reliable choice for professional UI backgrounds or security-focused branding. Pair this hex code with warm, sandy neutrals to soften its cold edge. It provides enough contrast to keep white text readable, making it a solid foundation for functional layouts.
Questions about #1f639b
What is #1f639b in RGB, HSL and CMYK?
In RGB, #1f639b is rgb(31, 99, 155), in HSL hsl(207, 67%, 36%) and in CMYK 80%, 36%, 0%, 39%.
What colors pair well with #1f639b in a design system?
Because #1f639b is a muted, desaturated blue, it works exceptionally well with warm, sandy neutrals or soft creams to balance its cool, serious temperature. You can also create a sophisticated contrast by pairing it with terracotta accents or a sharp, dark charcoal for text.
Is #1f639b readable on white or black?
#1f639b has a 6.33:1 contrast ratio on white and 3.31:1 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 works only for large text (24px, or 18.5px bold). Try other pairs in the contrast checker.