Colour

#A0000D

#A0000D
Red
Dark
Nearest: Firebrick

#A0000D is a red with RGB values 160, 0, 13 and HSL 355°, 100%, 31%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A0000D#A0000D

HEX#A0000D

RGBrgb(160, 0, 13)

RGB (0–1)0.6275, 0, 0.051

RGB percentages62.7%, 0%, 5.1%

HSLhsl(355.1, 100%, 31.4%)

HSV / HSBhsv(355.1, 100%, 62.7%)

CMYK0%, 100%, 91.9%, 37.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,485,773

CSS custom property--colour: #A0000D;

Brightness & contrast

Relative luminance0.07503WCAG 2.x, 0 is black and 1 is white

Perceived brightness87.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.4:1

Contrast with white8.4:1WCAG normal text: AAA

Contrast with black2.5:1WCAG normal text: Fail

Greyscale equivalent#232323

Inverted#5FFFF2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#413909no red cones; affects about 1% of men; ΔE 61.3 from the original

Deuteranopia#645800no green cones; the most common form, about 1% of men; ΔE 60.9 from the original

Tritanopia#B1000Ano blue cones; rare, and affects men and women equally; ΔE 7.9 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text8.4:1WCAG large text: AAA

Contrast with black, large text2.5:1WCAG large text: Fail

Named colours

Firebrick · ΔE 7.4 Dark red · ΔE 7.5 Maroon · ΔE 11.9 Brown · ΔE 13.9 Crimson · ΔE 21.6 Tomato · ΔE 29.7

Nearest named CSS colourFirebrick (#B22222)ΔE 7.4, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#00A093

Analogous#A0005D, #A04300

Triadic#0DA000, #000DA0

Split complementary#00A043, #005DA0

Tetradic#5DA000, #00A093, #4300A0

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FF6D79

Lighter +30%#FF3A4A

Lighter +20%#FF071B

Lighter +10%#D30011

Darker −10%#6D0009

Darker −20%#3A0005

Darker −30%#070001

Darker −40%#000000

More saturated +25%#A0000D

Less saturated −25%#8C141E

Channel breakdown

R160

B13

Red160 (62.7%)

Green0 (0%)

Blue13 (5.1%)

Hue355.13°

Saturation (HSL)100%

Lightness31.37%

Dominant channelRed

Hex per channelR A0 · G 00 · B 0D

Keep nerding

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#A0000D

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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