Recognised as Colour
#A50018
- #A50018
- Red
- Dark
- Nearest: Firebrick
#A50018 is a red with RGB values 165, 0, 24 and HSL 351°, 100%, 32%. It is a dark colour, so white text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#A50018#A50018
HEX#A50018
RGBrgb(165, 0, 24)
RGB (0–1)0.6471, 0, 0.0941
RGB percentages64.7%, 0%, 9.4%
HSLhsl(351.3, 100%, 32.4%)
HSV / HSBhsv(351.3, 100%, 64.7%)
CMYK0%, 100%, 85.5%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,813,464
CSS custom property--colour: #A50018;
Brightness & contrast
Relative luminance0.08065WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.04:1
Contrast with white8.04:1WCAG normal text: AAA
Contrast with black2.61:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#5AFFE7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.04:1WCAG large text: AAA
Contrast with black, large text2.61:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00A58D
Analogous#A5006A, #A53A00
Triadic#18A500, #0018A5
Split complementary#00A53A, #006BA5
Tetradic#6BA500, #00A58D, #3A00A5
Tints, shades & saturation
Channel breakdown
R165
G0
B24
Red165 (64.7%)
Green0 (0%)
Blue24 (9.4%)
Hue351.27°
Saturation (HSL)100%
Lightness32.35%
Dominant channelRed
Hex per channelR A5 · G 00 · B 18
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