Recognised as Colour

#37071B

#37071B
Red
Dark
Nearest: Black

#37071B is a red with RGB values 55, 7, 27 and HSL 335°, 77%, 12%. It is a dark colour, so white text on it reaches 17.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#37071B#37071B

HEX#37071B

RGBrgb(55, 7, 27)

RGB (0–1)0.2157, 0.0275, 0.1059

RGB percentages21.6%, 2.7%, 10.6%

HSLhsl(335, 77.4%, 12.2%)

HSV / HSBhsv(335, 87.3%, 21.6%)

CMYK0%, 87.3%, 50.9%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,606,299

CSS custom property--colour: #37071B;

Brightness & contrast

Relative luminance0.01043WCAG 2.x, 0 is black and 1 is white

Perceived brightness31.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.37:1

Contrast with white17.37:1WCAG normal text: AAA

Contrast with black1.21:1WCAG normal text: Fail

Greyscale equivalent#131313

Inverted#C8F8E4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#11141Bno red cones; affects about 1% of men; ΔE 25.3 from the original

Deuteranopia#1F1E1Ano green cones; the most common form, about 1% of men; ΔE 25.9 from the original

Tritanopia#3C0210no blue cones; rare, and affects men and women equally; ΔE 8.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.37:1WCAG large text: AAA

Contrast with black, large text1.21:1WCAG large text: Fail

Named colours

Black · ΔE 26.9 Dark slate grey · ΔE 43.1 Dim grey · ΔE 43.2 Dark slateblue · ΔE 47.2 Maroon · ΔE 47.3 Brown · ΔE 48.3

Nearest named CSS colourBlack (#000000)ΔE 26.9, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#073723

Analogous#370733, #370B07

Triadic#1B3707, #071B37

Split complementary#07370B, #073337

Tetradic#333707, #073723, #0B0737

Tints, shades & saturation

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

Lighter +40%#E32775

Lighter +30%#BF185E

Lighter +20%#911347

Lighter +10%#640D31

Darker −10%#0A0105

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#3E001A

Less saturated −25%#2F0F1C

Channel breakdown

R55

B27

Red55 (21.6%)

Green7 (2.7%)

Blue27 (10.6%)

Hue335°

Saturation (HSL)77.42%

Lightness12.16%

Dominant channelRed

Hex per channelR 37 · G 07 · B 1B

Keep nerding

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#37071B

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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