Recognised as Colour
#331F21
- #331F21
- Red
- Dark
- Nearest: Black
#331F21 is a red with RGB values 51, 31, 33 and HSL 354°, 24%, 16%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#331F21#331F21
HEX#331F21
RGBrgb(51, 31, 33)
RGB (0–1)0.2, 0.1216, 0.1294
RGB percentages20%, 12.2%, 12.9%
HSLhsl(354, 24.4%, 16.1%)
HSV / HSBhsv(354, 39.2%, 20%)
CMYK0%, 39.2%, 35.3%, 80%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,350,305
CSS custom property--colour: #331F21;
Brightness & contrast
Relative luminance0.01794WCAG 2.x, 0 is black and 1 is white
Perceived brightness38.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.46:1
Contrast with white15.46:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#232323
Inverted#CCE0DE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.46:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#1F3331
Analogous#331F2B, #33271F
Triadic#21331F, #1F2133
Split complementary#1F3327, #1F2B33
Tetradic#2B331F, #1F3331, #271F33
Tints, shades & saturation
Channel breakdown
R51
G31
B33
Red51 (20%)
Green31 (12.2%)
Blue33 (12.9%)
Hue354°
Saturation (HSL)24.39%
Lightness16.08%
Dominant channelRed
Hex per channelR 33 · G 1F · B 21
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