#0D66B4 Hex Color
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#0d66b4 is a fairly saturated, cool blue with a clean, medium-dark appearance. Its controlled intensity suggests trust, reliability, and security, making it useful for finance, healthcare, technology, government, and law enforcement branding. Use it as a supporting brand color or UI accent; white text reaches about 5.9:1 contrast. The hex code is #0d66b4.
Questions about #0d66b4
What is #0d66b4 in RGB, HSL and CMYK?
In RGB, #0d66b4 is rgb(13, 102, 180), in HSL hsl(208, 87%, 38%) and in CMYK 93%, 43%, 0%, 29%.
Is #0d66b4 a warm or cool blue?
#0d66b4 is a cool blue, with a clean, controlled appearance that leans toward trust and reliability rather than warmth. Its medium-dark value helps it feel focused and dependable in interfaces, identity systems, and professional visual designs.
Which colors pair well with #0d66b4?
#0d66b4 pairs well with white, pale blue, cool gray, and warm orange accents. Use white or soft neutrals for clean contrast, while a restrained orange can create complementary energy without overpowering the blue.
Where does #0d66b4 work best?
#0d66b4 works well as a primary or supporting accent in finance, healthcare, technology, government, and security-focused interfaces. Its saturated blue communicates stability while remaining vivid enough for buttons, links, navigation, and selected states.
Is #0d66b4 readable on white or black?
#0d66b4 has a 5.87:1 contrast ratio on white and 3.57:1 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.