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Recognised as Colour

#573B40

  • #573B40
  • Red
  • Dark
  • Nearest: Dim grey

#573B40 is a red with RGB values 87, 59, 64 and HSL 349°, 19%, 29%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#573B40#573B40
HEX#573B40
RGBrgb(87, 59, 64)
RGB (0–1)0.3412, 0.2314, 0.251
RGB percentages34.1%, 23.1%, 25.1%
HSLhsl(349.3, 19.2%, 28.6%)
HSV / HSBhsv(349.3, 32.2%, 34.1%)
CMYK0%, 32.2%, 26.4%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,716,800
CSS custom property--colour: #573B40;

Brightness & contrast

Relative luminance0.05524WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.98:1
Contrast with white9.98:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#A8C4BF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3F3F40no red cones; affects about 1% of men; ΔE 13.3 from the original
Deuteranopia#46443Fno green cones; the most common form, about 1% of men; ΔE 13.5 from the original
Tritanopia#5C393Dno blue cones; rare, and affects men and women equally; ΔE 3.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.98:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dim grey · ΔE 21Dark slate grey · ΔE 25.7Gray · ΔE 28.7Black · ΔE 31.2Slate grey · ΔE 31.6Light slate grey · ΔE 34.3
Nearest named CSS colourDim grey (#696969)ΔE 21.01, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B5752
Analogous#573B4E, #57443B
Triadic#40573B, #3B4057
Split complementary#3B5744, #3B4E57
Tetradic#4E573B, #3B5752, #443B57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BEA0A5
Lighter +30%#AA8188
Lighter +20%#94646D
Lighter +10%#755056
Darker −10%#39262A
Darker −20%#1A1213
Darker −30%#000000
Darker −40%#000000
More saturated +25%#692934
Less saturated −25%#494949

Channel breakdown

R87
G59
B64
Red87 (34.1%)
Green59 (23.1%)
Blue64 (25.1%)
Hue349.29°
Saturation (HSL)19.18%
Lightness28.63%
Dominant channelRed
Hex per channelR 57 · G 3B · B 40

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Every value on this page was computed from “573b40” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.