Colour

#37040A

#37040A
Red
Dark
Nearest: Black

#37040A is a red with RGB values 55, 4, 10 and HSL 353°, 86%, 12%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#37040A#37040A

HEX#37040A

RGBrgb(55, 4, 10)

RGB (0–1)0.2157, 0.0157, 0.0392

RGB percentages21.6%, 1.6%, 3.9%

HSLhsl(352.9, 86.4%, 11.6%)

HSV / HSBhsv(352.9, 92.7%, 21.6%)

CMYK0%, 92.7%, 81.8%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,605,514

CSS custom property--colour: #37040A;

Brightness & contrast

Relative luminance0.00921WCAG 2.x, 0 is black and 1 is white

Perceived brightness30.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.73:1

Contrast with white17.73:1WCAG normal text: AAA

Contrast with black1.18:1WCAG normal text: Fail

Greyscale equivalent#0F0F0F

Inverted#C8FBF5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#13110Ano red cones; affects about 1% of men; ΔE 26.4 from the original

Deuteranopia#201C08no green cones; the most common form, about 1% of men; ΔE 27 from the original

Tritanopia#3D0006no blue cones; rare, and affects men and women equally; ΔE 4.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.73:1WCAG large text: AAA

Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Black · ΔE 28.1 Maroon · ΔE 40.8 Saddle brown · ΔE 43.3 Brown · ΔE 43.8 Sienna · ΔE 44.6 Dim grey · ΔE 45

Nearest named CSS colourBlack (#000000)ΔE 28.07, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#043731

Analogous#370423, #371704

Triadic#0A3704, #040A37

Split complementary#043717, #042337

Tetradic#243704, #043731, #180437

Tints, shades & saturation

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

Lighter +40%#EE1932

Lighter +30%#C60E24

Lighter +20%#960B1B

Lighter +10%#670713

Darker −10%#070101

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#3B0007

Less saturated −25%#300B10

Channel breakdown

R55

B10

Red55 (21.6%)

Green4 (1.6%)

Blue10 (3.9%)

Hue352.94°

Saturation (HSL)86.44%

Lightness11.57%

Dominant channelRed

Hex per channelR 37 · G 04 · B 0A

Keep nerding

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#37040A

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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