#21D4FD Color
#21D4FD is rgb(33, 212, 253) in RGB and hsl(191, 98%, 56%) in HSL. The closest CSS named color is DeepSkyBlue. Black text is most readable on this background.
#21D4FD
HEX
#21D4FDRGB
rgb(33, 212, 253)HSL
hsl(191, 98%, 56%)HSV
hsv(191, 87%, 99%)OKLCH
oklch(80.5% 0.141 219.2)CMYK
cmyk(87%, 16%, 0%, 1%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #21D4FD background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text1.76:1AA normal ✗AA large ✗AAA normal ✗
TextBlack text11.9:1AA normal ✓AA large ✓AAA normal ✓
Color Harmonies
Colors that pair well with #21D4FD based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #21D4FD, useful for hover states, backgrounds, and text variants.