#21D4E8 Color
#21D4E8 is rgb(33, 212, 232) in RGB and hsl(186, 81%, 52%) in HSL. The closest CSS named color is DarkTurquoise. Black text is most readable on this background.
#21D4E8
HEX
#21D4E8RGB
rgb(33, 212, 232)HSL
hsl(186, 81%, 52%)HSV
hsv(186, 86%, 91%)OKLCH
oklch(79.7% 0.132 207.3)CMYK
cmyk(86%, 9%, 0%, 9%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #21D4E8 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text1.8:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text11.65:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #21D4E8 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #21D4E8, useful for hover states, backgrounds, and text variants.