#21E427 Color
#21E427 is rgb(33, 228, 39) in RGB and hsl(122, 78%, 51%) in HSL. The closest CSS named color is LimeGreen. Black text is most readable on this background.
#21E427
HEX
#21E427RGB
rgb(33, 228, 39)HSL
hsl(122, 78%, 51%)HSV
hsv(122, 86%, 89%)OKLCH
oklch(79.9% 0.26 142.9)CMYK
cmyk(86%, 0%, 83%, 11%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #21E427 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text1.72:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text12.19:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #21E427 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #21E427, useful for hover states, backgrounds, and text variants.