Recognised as Colour

#91021B

#91021B
Red
Dark
Nearest: Brown

#91021B is a red with RGB values 145, 2, 27 and HSL 350°, 97%, 29%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#91021B#91021B

HEX#91021B

RGBrgb(145, 2, 27)

RGB (0–1)0.5686, 0.0078, 0.1059

RGB percentages56.9%, 0.8%, 10.6%

HSLhsl(349.5, 97.3%, 28.8%)

HSV / HSBhsv(349.5, 98.6%, 56.9%)

CMYK0%, 98.6%, 81.4%, 43.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer9,503,259

CSS custom property--colour: #91021B;

Brightness & contrast

Relative luminance0.06142WCAG 2.x, 0 is black and 1 is white

Perceived brightness79.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 9.42:1

Contrast with white9.42:1WCAG normal text: AAA

Contrast with black2.23:1WCAG normal text: Fail

Greyscale equivalent#222222

Inverted#6EFDE4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#39341Ano red cones; affects about 1% of men; ΔE 57.1 from the original

Deuteranopia#5A5015no green cones; the most common form, about 1% of men; ΔE 56.5 from the original

Tritanopia#A00010no blue cones; rare, and affects men and women equally; ΔE 11.4 from the original

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

Contrast with white, large text9.42:1WCAG large text: AAA

Contrast with black, large text2.23:1WCAG large text: Fail

Named colours

Brown · ΔE 8.4 Maroon · ΔE 10.3 Dark red · ΔE 11.6 Firebrick · ΔE 12.5 Crimson · ΔE 25.3 Indian red · ΔE 26.1

Nearest named CSS colourBrown (#A52A2A)ΔE 8.38, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#029178

Analogous#910263, #913002

Triadic#1B9102, #021B91

Split complementary#029130, #026391

Tetradic#639102, #029178, #300291

Tints, shades & saturation

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

Lighter +40%#FD627D

Lighter +30%#FC3054

Lighter +20%#F6032E

Lighter +10%#C30324

Darker −10%#5F0112

Darker −20%#2C0108

Darker −30%#000000

Darker −40%#000000

More saturated +25%#93001A

Less saturated −25%#7F1427

Channel breakdown

R145

B27

Red145 (56.9%)

Green2 (0.8%)

Blue27 (10.6%)

Hue349.51°

Saturation (HSL)97.28%

Lightness28.82%

Dominant channelRed

Hex per channelR 91 · G 02 · B 1B

Keep nerding

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#91021B

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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