Colour

#28131D

#28131D
Red
Dark
Nearest: Black

#28131D is a red with RGB values 40, 19, 29 and HSL 331°, 36%, 12%. It is a dark colour, so white text on it reaches 17.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#28131D#28131D

HEX#28131D

RGBrgb(40, 19, 29)

RGB (0–1)0.1569, 0.0745, 0.1137

RGB percentages15.7%, 7.5%, 11.4%

HSLhsl(331.4, 35.6%, 11.6%)

HSV / HSBhsv(331.4, 52.5%, 15.7%)

CMYK0%, 52.5%, 27.5%, 84.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,626,333

CSS custom property--colour: #28131D;

Brightness & contrast

Relative luminance0.01006WCAG 2.x, 0 is black and 1 is white

Perceived brightness28 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.48:1

Contrast with white17.48:1WCAG normal text: AAA

Contrast with black1.2:1WCAG normal text: Fail

Greyscale equivalent#181818

Inverted#D7ECE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#15171Dno red cones; affects about 1% of men; ΔE 12 from the original

Deuteranopia#1A1B1Cno green cones; the most common form, about 1% of men; ΔE 12.9 from the original

Tritanopia#2B1217no blue cones; rare, and affects men and women equally; ΔE 4.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.48:1WCAG large text: AAA

Contrast with black, large text1.2:1WCAG large text: Fail

Named colours

Black · ΔE 15.7 Dark slate grey · ΔE 32.9 Dim grey · ΔE 37.6 Gray · ΔE 46.3 Slate grey · ΔE 46.9 Dark slateblue · ΔE 47.3

Nearest named CSS colourBlack (#000000)ΔE 15.65, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#13281E

Analogous#281327, #281413

Triadic#1D2813, #131D28

Split complementary#132814, #132728

Tetradic#272813, #13281E, #141328

Tints, shades & saturation

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

Lighter +40%#AF5881

Lighter +30%#904468

Lighter +20%#6D344F

Lighter +10%#4B2336

Darker −10%#050304

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#2F0C1D

Less saturated −25%#211A1D

Channel breakdown

R40

G19

B29

Red40 (15.7%)

Green19 (7.5%)

Blue29 (11.4%)

Hue331.43°

Saturation (HSL)35.59%

Lightness11.57%

Dominant channelRed

Hex per channelR 28 · G 13 · B 1D

Keep nerding

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#28131D

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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