Recognised as Colour
#A3231D
- #A3231D
- Red
- Dark
- Nearest: Firebrick
#A3231D is a red with RGB values 163, 35, 29 and HSL 3°, 70%, 38%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#A3231D#A3231D
HEX#A3231D
RGBrgb(163, 35, 29)
RGB (0–1)0.6392, 0.1373, 0.1137
RGB percentages63.9%, 13.7%, 11.4%
HSLhsl(2.7, 69.8%, 37.6%)
HSV / HSBhsv(2.7, 82.2%, 63.9%)
CMYK0%, 78.5%, 82.2%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,691,357
CSS custom property--colour: #A3231D;
Brightness & contrast
Relative luminance0.09077WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.46:1
Contrast with white7.46:1WCAG normal text: AAA
Contrast with black2.82:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#5CDCE2
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.46:1WCAG large text: AAA
Contrast with black, large text2.82:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#1D9DA3
Analogous#A31D5A, #A3661D
Triadic#1DA323, #231DA3
Split complementary#1DA366, #1D5AA3
Tetradic#5AA31D, #1D9DA3, #661DA3
Tints, shades & saturation
Channel breakdown
R163
G35
B29
Red163 (63.9%)
Green35 (13.7%)
Blue29 (11.4%)
Hue2.69°
Saturation (HSL)69.79%
Lightness37.65%
Dominant channelRed
Hex per channelR A3 · G 23 · B 1D
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