#639BFA Hex Color
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#639bfa is a bright, strongly saturated blue with a cool cast and energetic presence. Its vivid intensity suits calls to action, technology interfaces, finance dashboards, and security-focused branding, especially as a supporting accent rather than a full background. The hex code #639bfa provides about 7.6:1 contrast with black text, supporting accessible body copy.
Questions about #639bfa
What is #639bfa in RGB, HSL and CMYK?
In RGB, #639bfa is rgb(99, 155, 250), in HSL hsl(218, 94%, 68%) and in CMYK 60%, 38%, 0%, 2%. Browse more shades of blue with names and hex codes.
What colors pair well with #639bfa?
Is #639bfa a warm or cool blue?
#639bfa reads as a cool blue because its strong blue base and cool cast create a crisp, energetic impression, making it well suited to digital interfaces, security products, and focused calls to action.
Is #639bfa readable on white or black?
#639bfa has a 2.76:1 contrast ratio on white and 7.59:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it is too faint for text and on black it works for body text. Try other pairs in the contrast checker.