Colour

#37021B

#37021B
Red
Dark
Nearest: Black

#37021B is a red with RGB values 55, 2, 27 and HSL 332°, 93%, 11%. 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

#37021B#37021B

HEX#37021B

RGBrgb(55, 2, 27)

RGB (0–1)0.2157, 0.0078, 0.1059

RGB percentages21.6%, 0.8%, 10.6%

HSLhsl(331.7, 93%, 11.2%)

HSV / HSBhsv(331.7, 96.4%, 21.6%)

CMYK0%, 96.4%, 50.9%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,605,019

CSS custom property--colour: #37021B;

Brightness & contrast

Relative luminance0.00935WCAG 2.x, 0 is black and 1 is white

Perceived brightness31.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.69:1

Contrast with white17.69:1WCAG normal text: AAA

Contrast with black1.19:1WCAG normal text: Fail

Greyscale equivalent#0F0F0F

Inverted#C8FDE4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0E121Cno red cones; affects about 1% of men; ΔE 27.5 from the original

Deuteranopia#1D1C1Ano green cones; the most common form, about 1% of men; ΔE 28 from the original

Tritanopia#3D000Dno blue cones; rare, and affects men and women equally; ΔE 10.6 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.69:1WCAG large text: AAA

Contrast with black, large text1.19:1WCAG large text: Fail

Named colours

Black · ΔE 29.1 Dim grey · ΔE 45.5 Dark slate grey · ΔE 45.7 Dark slateblue · ΔE 46.5 Maroon · ΔE 47.5 Brown · ΔE 48.4

Nearest named CSS colourBlack (#000000)ΔE 29.11, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#02371E

Analogous#370236, #370402

Triadic#1B3702, #021B37

Split complementary#023704, #023537

Tetradic#353702, #02371E, #030237

Tints, shades & saturation

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

Lighter +40%#F60F7C

Lighter +30%#CB0763

Lighter +20%#99064B

Lighter +10%#680433

Darker −10%#060003

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#39001B

Less saturated −25%#30091B

Channel breakdown

R55

B27

Red55 (21.6%)

Green2 (0.8%)

Blue27 (10.6%)

Hue331.7°

Saturation (HSL)92.98%

Lightness11.18%

Dominant channelRed

Hex per channelR 37 · G 02 · B 1B

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#37021B

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

Nerdulate something else