#66B257 Color
#66B257 is rgb(102, 178, 87) in RGB and hsl(110, 37%, 52%) in HSL. The closest CSS named color is MediumSeaGreen. Black text is most readable on this background.
#66B257
HEX
#66B257RGB
rgb(102, 178, 87)HSL
hsl(110, 37%, 52%)HSV
hsv(110, 51%, 70%)OKLCH
oklch(69.3% 0.147 140.4)CMYK
cmyk(43%, 0%, 51%, 30%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #66B257 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text2.6:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text8.07:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #66B257 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #66B257, useful for hover states, backgrounds, and text variants.