Colour
#31000A
- #31000A
- Red
- Dark
- Nearest: Black
#31000A is a red with RGB values 49, 0, 10 and HSL 348°, 100%, 10%. It is a dark colour, so white text on it reaches 18.5:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#31000A#31000A
HEX#31000A
RGBrgb(49, 0, 10)
RGB (0–1)0.1922, 0, 0.0392
RGB percentages19.2%, 0%, 3.9%
HSLhsl(347.8, 100%, 9.6%)
HSV / HSBhsv(347.8, 100%, 19.2%)
CMYK0%, 100%, 79.6%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,211,274
CSS custom property--colour: #31000A;
Brightness & contrast
Relative luminance0.00675WCAG 2.x, 0 is black and 1 is white
Perceived brightness27 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.5:1
Contrast with white18.5:1WCAG normal text: AAA
Contrast with black1.13:1WCAG normal text: Fail
Greyscale equivalent#0B0B0B
Inverted#CEFFF5
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.5:1WCAG large text: AAA
Contrast with black, large text1.13:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#003127
Analogous#310022, #310F00
Triadic#0A3100, #000A31
Split complementary#00310E, #002231
Tetradic#233100, #003127, #0F0031
Tints, shades & saturation
Channel breakdown
R49
G0
B10
Red49 (19.2%)
Green0 (0%)
Blue10 (3.9%)
Hue347.76°
Saturation (HSL)100%
Lightness9.61%
Dominant channelRed
Hex per channelR 31 · G 00 · B 0A
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