Colour
#21E5D0
- #21E5D0
- Cyan
- Light
- Nearest: Turquoise
#21E5D0 is a cyan with RGB values 33, 229, 208 and HSL 174°, 79%, 51%. It is a light colour, so black text on it reaches 13.2:1 contrast (AAA for normal text). The nearest named colour is Turquoise.
Colour values
#21E5D0#21E5D0
HEX#21E5D0
RGBrgb(33, 229, 208)
RGB (0–1)0.1294, 0.898, 0.8157
RGB percentages12.9%, 89.8%, 81.6%
HSLhsl(173.6, 79%, 51.4%)
HSV / HSBhsv(173.6, 85.6%, 89.8%)
CMYK85.6%, 0%, 9.2%, 10.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,221,520
CSS custom property--colour: #21E5D0;
Brightness & contrast
Relative luminance0.60916WCAG 2.x, 0 is black and 1 is white
Perceived brightness189.8 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 13.18:1
Contrast with white1.59:1WCAG normal text: Fail
Contrast with black13.18:1WCAG normal text: AAA
Greyscale equivalent#BABABA
Inverted#DE1A2F
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.59:1WCAG large text: Fail
Contrast with black, large text13.18:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#E52136
Analogous#21E56E, #2198E5
Triadic#D021E5, #E5D021
Split complementary#E52198, #E56E21
Tetradic#6E21E5, #E52136, #98E521
Tints, shades & saturation
Channel breakdown
R33
G229
B208
Red33 (12.9%)
Green229 (89.8%)
Blue208 (81.6%)
Hue173.57°
Saturation (HSL)79.03%
Lightness51.37%
Dominant channelGreen
Hex per channelR 21 · G E5 · B D0
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