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Recognised as Colour

#37222A

  • #37222A
  • Red
  • Dark
  • Nearest: Black

#37222A is a red with RGB values 55, 34, 42 and HSL 337°, 24%, 17%. It is a dark colour, so white text on it reaches 14.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#37222A#37222A
HEX#37222A
RGBrgb(55, 34, 42)
RGB (0–1)0.2157, 0.1333, 0.1647
RGB percentages21.6%, 13.3%, 16.5%
HSLhsl(337.1, 23.6%, 17.5%)
HSV / HSBhsv(337.1, 38.2%, 21.6%)
CMYK0%, 38.2%, 23.6%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,613,226
CSS custom property--colour: #37222A;

Brightness & contrast

Relative luminance0.02123WCAG 2.x, 0 is black and 1 is white
Perceived brightness42.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.74:1
Contrast with white14.74:1WCAG normal text: AAA
Contrast with black1.42:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#C8DDD5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#24262Ano red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#29292Ano green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#3A2125no blue cones; rare, and affects men and women equally; ΔE 3.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.74:1WCAG large text: AAA
Contrast with black, large text1.42:1WCAG large text: Fail

Named colours

Black · ΔE 19.9Dark slate grey · ΔE 27.9Dim grey · ΔE 30.6Gray · ΔE 39.2Slate grey · ΔE 40.3Light slate grey · ΔE 43.3
Nearest named CSS colourBlack (#000000)ΔE 19.85, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#22372F
Analogous#372235, #372522
Triadic#2A3722, #222A37
Split complementary#223725, #223537
Tetradic#343722, #22372F, #242237

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AC798C
Lighter +30%#965C72
Lighter +20%#76495A
Lighter +10%#573542
Darker −10%#170F12
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#421727
Less saturated −25%#2D2D2D

Channel breakdown

R55
G34
B42
Red55 (21.6%)
Green34 (13.3%)
Blue42 (16.5%)
Hue337.14°
Saturation (HSL)23.6%
Lightness17.45%
Dominant channelRed
Hex per channelR 37 · G 22 · B 2A

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Every value on this page was computed from “37222a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.