Colour
#C51B05
- #C51B05
- Red
- Dark
- Nearest: Firebrick
#C51B05 is a red with RGB values 197, 27, 5 and HSL 7°, 95%, 40%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#C51B05#C51B05
HEX#C51B05
RGBrgb(197, 27, 5)
RGB (0–1)0.7725, 0.1059, 0.0196
RGB percentages77.3%, 10.6%, 2%
HSLhsl(6.9, 95%, 39.6%)
HSV / HSBhsv(6.9, 97.5%, 77.3%)
CMYK0%, 86.3%, 97.5%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,917,509
CSS custom property--colour: #C51B05;
Brightness & contrast
Relative luminance0.12665WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.94:1
Contrast with white5.94:1WCAG normal text: AA
Contrast with black3.53:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#3AE4FA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.94:1WCAG large text: AAA
Contrast with black, large text3.53:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#05AFC5
Analogous#C5054F, #C57B05
Triadic#05C51B, #1B05C5
Split complementary#05C57B, #054FC5
Tetradic#4FC505, #05AFC5, #7B05C5
Tints, shades & saturation
Channel breakdown
R197
G27
B5
Red197 (77.3%)
Green27 (10.6%)
Blue5 (2%)
Hue6.88°
Saturation (HSL)95.05%
Lightness39.61%
Dominant channelRed
Hex per channelR C5 · G 1B · B 05
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