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Recognised as Colour

#643D4C

  • #643D4C
  • Red
  • Dark
  • Nearest: Dim grey

#643D4C is a red with RGB values 100, 61, 76 and HSL 337°, 24%, 32%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#643D4C#643D4C
HEX#643D4C
RGBrgb(100, 61, 76)
RGB (0–1)0.3922, 0.2392, 0.298
RGB percentages39.2%, 23.9%, 29.8%
HSLhsl(336.9, 24.2%, 31.6%)
HSV / HSBhsv(336.9, 39%, 39.2%)
CMYK0%, 39%, 24%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,292
CSS custom property--colour: #643D4C;

Brightness & contrast

Relative luminance0.06569WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.08:1
Contrast with white9.08:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#9BC2B3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#42444Dno red cones; affects about 1% of men; ΔE 18.6 from the original
Deuteranopia#4B4B4Bno green cones; the most common form, about 1% of men; ΔE 19.6 from the original
Tritanopia#6A3B42no blue cones; rare, and affects men and women equally; ΔE 7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.08:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail

Named colours

Dim grey · ΔE 23.8Gray · ΔE 30Dark slate grey · ΔE 31.2Slate grey · ΔE 32Rosy brown · ΔE 34Light slate grey · ΔE 34.4
Nearest named CSS colourDim grey (#696969)ΔE 23.81, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3D6455
Analogous#643D60, #64413D
Triadic#4C643D, #3D4C64
Split complementary#3D6441, #3D6064
Tetradic#60643D, #3D6455, #413D64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8A5B2
Lighter +30%#B58598
Lighter +20%#A1667D
Lighter +10%#845064
Darker −10%#442A34
Darker −20%#25161C
Darker −30%#050304
Darker −40%#000000
More saturated +25%#782947
Less saturated −25%#515151

Channel breakdown

R100
G61
B76
Red100 (39.2%)
Green61 (23.9%)
Blue76 (29.8%)
Hue336.92°
Saturation (HSL)24.22%
Lightness31.57%
Dominant channelRed
Hex per channelR 64 · G 3D · B 4C

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Every value on this page was computed from “643d4c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.