#66DD42 Hex Color
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Fresh, neon-leaning green with plenty of glow. The hex code #66dd42 is light and highly saturated, so it works best as a bold accent for eco, garden, or pharmacy branding rather than a full background. Black text sits at about 12:1 contrast here, well past AA. If it reads too loud, temper it with a grayer support tone (see what colors make gray).
Questions about #66dd42
What is #66dd42 in RGB, HSL and CMYK?
In RGB, #66dd42 is rgb(102, 221, 66), in HSL hsl(106, 70%, 56%) and in CMYK 54%, 0%, 70%, 13%.
What colors pair well with #66dd42?
Is #66dd42 readable on white or black?
#66dd42 has a 1.75:1 contrast ratio on white and 11.98:1 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.