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Recognised as Colour

#643E4B

  • #643E4B
  • Red
  • Dark
  • Nearest: Dim grey

#643E4B is a red with RGB values 100, 62, 75 and HSL 339°, 23%, 32%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#643E4B#643E4B
HEX#643E4B
RGBrgb(100, 62, 75)
RGB (0–1)0.3922, 0.2431, 0.2941
RGB percentages39.2%, 24.3%, 29.4%
HSLhsl(339.5, 23.5%, 31.8%)
HSV / HSBhsv(339.5, 38%, 39.2%)
CMYK0%, 38%, 25%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,547
CSS custom property--colour: #643E4B;

Brightness & contrast

Relative luminance0.06663WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9:1
Contrast with white9:1WCAG normal text: AAA
Contrast with black2.33:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#9BC1B4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#43454Bno red cones; affects about 1% of men; ΔE 18.4 from the original
Deuteranopia#4C4C4Ano green cones; the most common form, about 1% of men; ΔE 19.2 from the original
Tritanopia#6A3C42no blue cones; rare, and affects men and women equally; ΔE 6.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9:1WCAG large text: AAA
Contrast with black, large text2.33:1WCAG large text: Fail

Named colours

Dim grey · ΔE 23Gray · ΔE 29.3Dark slate grey · ΔE 30.5Slate grey · ΔE 31.6Rosy brown · ΔE 33.5Light slate grey · ΔE 34.1
Nearest named CSS colourDim grey (#696969)ΔE 22.99, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E6457
Analogous#643E5E, #64443E
Triadic#4B643E, #3E4B64
Split complementary#3E6444, #3E5E64
Tetradic#5E643E, #3E6457, #443E64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8A6B2
Lighter +30%#B48796
Lighter +20%#A1677B
Lighter +10%#835263
Darker −10%#452A33
Darker −20%#25171C
Darker −30%#060304
Darker −40%#000000
More saturated +25%#782A45
Less saturated −25%#515151

Channel breakdown

R100
G62
B75
Red100 (39.2%)
Green62 (24.3%)
Blue75 (29.4%)
Hue339.47°
Saturation (HSL)23.46%
Lightness31.76%
Dominant channelRed
Hex per channelR 64 · G 3E · B 4B

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Every value on this page was computed from “643e4b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.