Recognised as Colour
#C51D07
- #C51D07
- Red
- Dark
- Nearest: Firebrick
#C51D07 is a red with RGB values 197, 29, 7 and HSL 7°, 93%, 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
#C51D07#C51D07
HEX#C51D07
RGBrgb(197, 29, 7)
RGB (0–1)0.7725, 0.1137, 0.0275
RGB percentages77.3%, 11.4%, 2.7%
HSLhsl(6.9, 93.1%, 40%)
HSV / HSBhsv(6.9, 96.4%, 77.3%)
CMYK0%, 85.3%, 96.4%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,918,023
CSS custom property--colour: #C51D07;
Brightness & contrast
Relative luminance0.12764WCAG 2.x, 0 is black and 1 is white
Perceived brightness110 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.91:1
Contrast with white5.91:1WCAG normal text: AA
Contrast with black3.55:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#3AE2F8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.91:1WCAG large text: AAA
Contrast with black, large text3.55:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#07AFC5
Analogous#C50750, #C57C07
Triadic#07C51D, #1D07C5
Split complementary#07C57C, #0750C5
Tetradic#50C507, #07AFC5, #7C07C5
Tints, shades & saturation
Channel breakdown
R197
G29
B7
Red197 (77.3%)
Green29 (11.4%)
Blue7 (2.7%)
Hue6.95°
Saturation (HSL)93.14%
Lightness40%
Dominant channelRed
Hex per channelR C5 · G 1D · B 07
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page