Colour
#21151B
- #21151B
- Red
- Dark
- Nearest: Black
#21151B is a red with RGB values 33, 21, 27 and HSL 330°, 22%, 11%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#21151B#21151B
HEX#21151B
RGBrgb(33, 21, 27)
RGB (0–1)0.1294, 0.0824, 0.1059
RGB percentages12.9%, 8.2%, 10.6%
HSLhsl(330, 22.2%, 10.6%)
HSV / HSBhsv(330, 36.4%, 12.9%)
CMYK0%, 36.4%, 18.2%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,168,091
CSS custom property--colour: #21151B;
Brightness & contrast
Relative luminance0.00939WCAG 2.x, 0 is black and 1 is white
Perceived brightness25.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.68:1
Contrast with white17.68:1WCAG normal text: AAA
Contrast with black1.19:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#DEEAE4
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.68:1WCAG large text: AAA
Contrast with black, large text1.19:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#15211B
Analogous#211521, #211515
Triadic#1B2115, #151B21
Split complementary#152115, #152121
Tetradic#212115, #15211B, #151521
Tints, shades & saturation
Channel breakdown
R33
G21
B27
Red33 (12.9%)
Green21 (8.2%)
Blue27 (10.6%)
Hue330°
Saturation (HSL)22.22%
Lightness10.59%
Dominant channelRed
Hex per channelR 21 · G 15 · B 1B
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