#66C903 Color
#66C903 is rgb(102, 201, 3) in RGB and hsl(90, 97%, 40%) in HSL. The closest CSS named color is LawnGreen. Black text is most readable on this background.
#66C903
HEX
#66C903RGB
rgb(102, 201, 3)HSL
hsl(90, 97%, 40%)HSV
hsv(90, 99%, 79%)OKLCH
oklch(74.6% 0.219 135.6)CMYK
cmyk(49%, 0%, 99%, 21%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #66C903 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text2.12:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text9.92:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #66C903 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #66C903, useful for hover states, backgrounds, and text variants.