#51D663 Hex Color
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Not a soft sage or a muted forest tone, this green is bright and nearly neon. #51d663 reads fresh and glowing, which suits eco branding, gardens, and health products. Its high saturation works best as an accent or on dark mode UI; as a full background it can overwhelm. Black text hits about 11.1:1 contrast here, well past WCAG AA. Muted grays balance it, and what colors make gray shows how to mix them.
Questions about #51d663
What is #51d663 in RGB, HSL and CMYK?
In RGB, #51d663 is rgb(81, 214, 99), in HSL hsl(128, 62%, 58%) and in CMYK 62%, 0%, 54%, 16%.
What colors pair well with #51d663?
Deep neutrals like charcoal and navy ground its brightness, while its complementary red-violet makes a bold two-color scheme. Warm grays also soften the neon edge without dulling it.
Is #51d663 readable on white or black?
#51d663 has a 1.88:1 contrast ratio on white and 11.14:1 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.