Colour
#21372D
- #21372D
- Cyan
- Dark
- Nearest: Dark slate grey
#21372D is a cyan with RGB values 33, 55, 45 and HSL 153°, 25%, 17%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#21372D#21372D
HEX#21372D
RGBrgb(33, 55, 45)
RGB (0–1)0.1294, 0.2157, 0.1765
RGB percentages12.9%, 21.6%, 17.6%
HSLhsl(152.7, 25%, 17.3%)
HSV / HSBhsv(152.7, 40%, 21.6%)
CMYK40%, 0%, 18.2%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,176,813
CSS custom property--colour: #21372D;
Brightness & contrast
Relative luminance0.03245WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.73:1
Contrast with white12.73:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#DEC8D2
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.73:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#37212B
Analogous#213722, #213637
Triadic#2D2137, #372D21
Split complementary#372136, #372221
Tetradic#222137, #37212B, #363721
Tints, shades & saturation
Channel breakdown
R33
G55
B45
Red33 (12.9%)
Green55 (21.6%)
Blue45 (17.6%)
Hue152.73°
Saturation (HSL)25%
Lightness17.25%
Dominant channelGreen
Hex per channelR 21 · G 37 · B 2D
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