Recognised as Colour
#A40737
- #A40737
- Red
- Dark
- Nearest: Brown
#A40737 is a red with RGB values 164, 7, 55 and HSL 342°, 92%, 34%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Brown.
Colour values
#A40737#A40737
HEX#A40737
RGBrgb(164, 7, 55)
RGB (0–1)0.6431, 0.0275, 0.2157
RGB percentages64.3%, 2.7%, 21.6%
HSLhsl(341.7, 91.8%, 33.5%)
HSV / HSBhsv(341.7, 95.7%, 64.3%)
CMYK0%, 95.7%, 66.5%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,749,751
CSS custom property--colour: #A40737;
Brightness & contrast
Relative luminance0.0832WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.88:1
Contrast with white7.88:1WCAG normal text: AAA
Contrast with black2.66:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#5BF8C8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.88:1WCAG large text: AAA
Contrast with black, large text2.66:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#07A474
Analogous#A40785, #A42507
Triadic#37A407, #0737A4
Split complementary#07A425, #0786A4
Tetradic#86A407, #07A474, #2607A4
Tints, shades & saturation
Channel breakdown
R164
G7
B55
Red164 (64.3%)
Green7 (2.7%)
Blue55 (21.6%)
Hue341.66°
Saturation (HSL)91.81%
Lightness33.53%
Dominant channelRed
Hex per channelR A4 · G 07 · B 37
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