Recognised as Colour

#37040B

#37040B
Red
Dark
Nearest: Black

#37040B is a red with RGB values 55, 4, 11 and HSL 352°, 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

#37040B#37040B

HEX#37040B

RGBrgb(55, 4, 11)

RGB (0–1)0.2157, 0.0157, 0.0431

RGB percentages21.6%, 1.6%, 4.3%

HSLhsl(351.8, 86.4%, 11.6%)

HSV / HSBhsv(351.8, 92.7%, 21.6%)

CMYK0%, 92.7%, 80%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,605,515

CSS custom property--colour: #37040B;

Brightness & contrast

Relative luminance0.00923WCAG 2.x, 0 is black and 1 is white

Perceived brightness30.5 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#C8FBF4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

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

Deuteranopia#201C09no green cones; the most common form, about 1% of men; ΔE 26.9 from the original

Tritanopia#3D0007no 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 Maroon · ΔE 41 Saddle brown · ΔE 43.6 Brown · ΔE 43.9 Sienna · ΔE 44.8 Dim grey · ΔE 44.9

Nearest named CSS colourBlack (#000000)ΔE 28.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#043730

Analogous#370425, #371604

Triadic#0B3704, #040B37

Split complementary#043716, #042537

Tetradic#253704, #043730, #160437

Tints, shades & saturation

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

Lighter +40%#EE1936

Lighter +30%#C60E28

Lighter +20%#960B1E

Lighter +10%#670715

Darker −10%#070101

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#3B0008

Less saturated −25%#300B10

Channel breakdown

R55

B11

Red55 (21.6%)

Green4 (1.6%)

Blue11 (4.3%)

Hue351.76°

Saturation (HSL)86.44%

Lightness11.57%

Dominant channelRed

Hex per channelR 37 · G 04 · B 0B

Keep nerding

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#37040B

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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