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Recognised as Colour

#643E4A

  • #643E4A
  • Red
  • Dark
  • Nearest: Dim grey

#643E4A is a red with RGB values 100, 62, 74 and HSL 341°, 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

#643E4A#643E4A
HEX#643E4A
RGBrgb(100, 62, 74)
RGB (0–1)0.3922, 0.2431, 0.2902
RGB percentages39.2%, 24.3%, 29%
HSLhsl(341.1, 23.5%, 31.8%)
HSV / HSBhsv(341.1, 38%, 39.2%)
CMYK0%, 38%, 26%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,546
CSS custom property--colour: #643E4A;

Brightness & contrast

Relative luminance0.06649WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.01:1
Contrast with white9.01:1WCAG normal text: AAA
Contrast with black2.33:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#9BC1B5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#43454Ano red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#4C4C49no green cones; the most common form, about 1% of men; ΔE 19.3 from the original
Tritanopia#6A3C42no blue cones; rare, and affects men and women equally; ΔE 6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.01:1WCAG large text: AAA
Contrast with black, large text2.33:1WCAG large text: Fail

Named colours

Dim grey · ΔE 22.9Gray · ΔE 29.2Dark slate grey · ΔE 30.4Slate grey · ΔE 31.7Rosy brown · ΔE 33.4Light slate grey · ΔE 34.2
Nearest named CSS colourDim grey (#696969)ΔE 22.85, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E6458
Analogous#643E5D, #64453E
Triadic#4A643E, #3E4A64
Split complementary#3E6445, #3E5D64
Tetradic#5D643E, #3E6458, #453E64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8A6B1
Lighter +30%#B48795
Lighter +20%#A16779
Lighter +10%#835261
Darker −10%#452A33
Darker −20%#25171B
Darker −30%#060304
Darker −40%#000000
More saturated +25%#782A43
Less saturated −25%#515151

Channel breakdown

R100
G62
B74
Red100 (39.2%)
Green62 (24.3%)
Blue74 (29%)
Hue341.05°
Saturation (HSL)23.46%
Lightness31.76%
Dominant channelRed
Hex per channelR 64 · G 3E · B 4A

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Every value on this page was computed from “643e4a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.