#66B21F Color
#66B21F is rgb(102, 178, 31) in RGB and hsl(91, 70%, 41%) in HSL. The closest CSS named color is OliveDrab. Black text is most readable on this background.
#66B21F
HEX
#66B21FRGB
rgb(102, 178, 31)HSL
hsl(91, 70%, 41%)HSV
hsv(91, 83%, 70%)OKLCH
oklch(68.8% 0.187 134.1)CMYK
cmyk(43%, 0%, 83%, 30%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #66B21F background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text2.64:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text7.95:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #66B21F based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #66B21F, useful for hover states, backgrounds, and text variants.