#669998 Hex Color
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#669998 is an ashy, muted cyan with significant gray undertones. Because it is highly unsaturated, this hex code avoids looking juvenile, making it a reliable base for tech interfaces or professional branding. It reads well behind black text, offering strong accessibility for body copy. Pair it with crisp white or deep charcoal to keep the dusty appearance from looking washed out in large blocks.
Questions about #669998
What is #669998 in RGB, HSL and CMYK?
In RGB, #669998 is rgb(102, 153, 152), in HSL hsl(179, 20%, 50%) and in CMYK 33%, 0%, 1%, 40%.
Why does #669998 work well for user interfaces?
The highly unsaturated nature of #669998 prevents visual fatigue, making it an excellent base color for tech dashboards or enterprise applications. It provides enough visual interest to feel intentional while remaining neutral enough to host both charcoal and crisp white text.
How can I make #669998 look less washed out?
Contrast is key to stabilizing this dusty cyan, so pair it with high-impact neutrals rather than mid-tones. Using a deep charcoal or matte black keeps the gray undertones of #669998 feeling deliberate and high-end, effectively preventing the shade from appearing dull in large layouts.
Is #669998 readable on white or black?
#669998 has a 3.19:1 contrast ratio on white and 6.57:1 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.