#307BD1 Hex Color
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Bright and strongly saturated, #307bd1 is a cool blue with a clean, slightly electric character. Its energy suits calls to action, finance interfaces, technology branding, and security-focused designs. Use it as a supporting accent beside navy or warm gray rather than a full-page background. The hex code #307bd1 offers about 4.9:1 contrast with black body text.
Questions about #307bd1
What is #307bd1 in RGB, HSL and CMYK?
In RGB, #307bd1 is rgb(48, 123, 209), in HSL hsl(212, 64%, 50%) and in CMYK 77%, 41%, 0%, 18%.
Which colors pair well with #307bd1?
Pair #307bd1 with navy, warm gray, or white to balance its cool electric energy; navy deepens the palette, warm gray softens it, and white keeps interfaces crisp without competing with the content. Use the blue as an accent rather than a full-page background.
Where does #307bd1 work best in interface design?
#307bd1 works well for calls to action, links, finance dashboards, and security interfaces because its bright cool blue feels clear and energetic in focused interface layouts where emphasis matters most. Keep large surfaces restrained, pairing it with navy or warm neutrals for balance.
Is #307bd1 readable on white or black?
#307bd1 has a 4.30:1 contrast ratio on white and 4.87:1 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.