Colour

#AD0028

#AD0028
Red
Dark
Nearest: Firebrick

#AD0028 is a red with RGB values 173, 0, 40 and HSL 346°, 100%, 34%. 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

#AD0028#AD0028

HEX#AD0028

RGBrgb(173, 0, 40)

RGB (0–1)0.6784, 0, 0.1569

RGB percentages67.8%, 0%, 15.7%

HSLhsl(346.1, 100%, 33.9%)

HSV / HSBhsv(346.1, 100%, 67.8%)

CMYK0%, 100%, 76.9%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,337,768

CSS custom property--colour: #AD0028;

Brightness & contrast

Relative luminance0.09037WCAG 2.x, 0 is black and 1 is white

Perceived brightness95.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.48:1

Contrast with white7.48:1WCAG normal text: AAA

Contrast with black2.81:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#52FFD7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#453F27no red cones; affects about 1% of men; ΔE 64.7 from the original

Deuteranopia#6C6022no green cones; the most common form, about 1% of men; ΔE 64.3 from the original

Tritanopia#BF0017no blue cones; rare, and affects men and women equally; ΔE 15.5 from the original

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

Contrast with white, large text7.48:1WCAG large text: AAA

Contrast with black, large text2.81:1WCAG large text: Fail

Named colours

Firebrick · ΔE 9.1 Brown · ΔE 11.1 Crimson · ΔE 15.3 Dark red · ΔE 16.5 Maroon · ΔE 18.1 Indian red · ΔE 25

Nearest named CSS colourFirebrick (#B22222)ΔE 9.08, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00AD85

Analogous#AD007F, #AD2E00

Triadic#28AD00, #0028AD

Split complementary#00AD2E, #007FAD

Tetradic#7FAD00, #00AD85, #2E00AD

Tints, shades & saturation

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

Lighter +40%#FF7A99

Lighter +30%#FF4772

Lighter +20%#FF144A

Lighter +10%#E00034

Darker −10%#7A001C

Darker −20%#470010

Darker −30%#140005

Darker −40%#000000

More saturated +25%#AD0028

Less saturated −25%#971634

Channel breakdown

R173

B40

Red173 (67.8%)

Green0 (0%)

Blue40 (15.7%)

Hue346.13°

Saturation (HSL)100%

Lightness33.92%

Dominant channelRed

Hex per channelR AD · G 00 · B 28

Keep nerding

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#AD0028

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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