Recognised as Colour
#F40D10
- #F40D10
- Red
- Dark
- Nearest: Red
#F40D10 is a red with RGB values 244, 13, 16 and HSL 359°, 91%, 50%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Red.
Colour values
#F40D10#F40D10
HEX#F40D10
RGBrgb(244, 13, 16)
RGB (0–1)0.9569, 0.051, 0.0627
RGB percentages95.7%, 5.1%, 6.3%
HSLhsl(359.2, 91.3%, 50.4%)
HSV / HSBhsv(359.2, 94.7%, 95.7%)
CMYK0%, 94.7%, 93.4%, 4.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,994,128
CSS custom property--colour: #F40D10;
Brightness & contrast
Relative luminance0.19558WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.28:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#3E3E3E
Inverted#0BF2EF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.28:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#0DF4F1
Analogous#F40D84, #F47D0D
Triadic#10F40D, #0D10F4
Split complementary#0DF47D, #0D84F4
Tetradic#84F40D, #0DF4F1, #7D0DF4
Tints, shades & saturation
Channel breakdown
R244
G13
B16
Red244 (95.7%)
Green13 (5.1%)
Blue16 (6.3%)
Hue359.22°
Saturation (HSL)91.3%
Lightness50.39%
Dominant channelRed
Hex per channelR F4 · G 0D · B 10
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