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Recognised as Colour

#37201D

  • #37201D
  • Red
  • Dark
  • Nearest: Black

#37201D is a red with RGB values 55, 32, 29 and HSL 7°, 31%, 16%. It is a dark colour, so white text on it reaches 15.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#37201D#37201D
HEX#37201D
RGBrgb(55, 32, 29)
RGB (0–1)0.2157, 0.1255, 0.1137
RGB percentages21.6%, 12.5%, 11.4%
HSLhsl(6.9, 31%, 16.5%)
HSV / HSBhsv(6.9, 47.3%, 21.6%)
CMYK0%, 41.8%, 47.3%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,612,701
CSS custom property--colour: #37201D;

Brightness & contrast

Relative luminance0.01934WCAG 2.x, 0 is black and 1 is white
Perceived brightness40 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.14:1
Contrast with white15.14:1WCAG normal text: AAA
Contrast with black1.39:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#C8DFE2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#25231Dno red cones; affects about 1% of men; ΔE 11.4 from the original
Deuteranopia#2B281Dno green cones; the most common form, about 1% of men; ΔE 11.7 from the original
Tritanopia#3C1D1Fno 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 text15.14:1WCAG large text: AAA
Contrast with black, large text1.39:1WCAG large text: Fail

Named colours

Black · ΔE 19.7Dark slate grey · ΔE 29.5Dim grey · ΔE 31.9Gray · ΔE 40.5Slate grey · ΔE 43.4Saddle brown · ΔE 43.9
Nearest named CSS colourBlack (#000000)ΔE 19.7, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1D3437
Analogous#371D27, #372D1D
Triadic#1D3720, #201D37
Split complementary#1D372D, #1D2737
Tetradic#27371D, #1D3437, #2D1D37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B2766E
Lighter +30%#9B5A52
Lighter +20%#7A4740
Lighter +10%#58332F
Darker −10%#160D0B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#421812
Less saturated −25%#2D2827

Channel breakdown

R55
G32
B29
Red55 (21.6%)
Green32 (12.5%)
Blue29 (11.4%)
Hue6.92°
Saturation (HSL)30.95%
Lightness16.47%
Dominant channelRed
Hex per channelR 37 · G 20 · B 1D

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Every value on this page was computed from “37201d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.