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Recognised as Colour

#643A44

  • #643A44
  • Red
  • Dark
  • Nearest: Dim grey

#643A44 is a red with RGB values 100, 58, 68 and HSL 346°, 27%, 31%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#643A44#643A44
HEX#643A44
RGBrgb(100, 58, 68)
RGB (0–1)0.3922, 0.2275, 0.2667
RGB percentages39.2%, 22.7%, 26.7%
HSLhsl(345.7, 26.6%, 31%)
HSV / HSBhsv(345.7, 42%, 39.2%)
CMYK0%, 42%, 32%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,568,516
CSS custom property--colour: #643A44;

Brightness & contrast

Relative luminance0.06153WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.41:1
Contrast with white9.41:1WCAG normal text: AAA
Contrast with black2.23:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#9BC5BB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#414144no red cones; affects about 1% of men; ΔE 19.8 from the original
Deuteranopia#4B4943no green cones; the most common form, about 1% of men; ΔE 20.6 from the original
Tritanopia#6B373Eno blue cones; rare, and affects men and women equally; ΔE 5.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.41:1WCAG large text: AAA
Contrast with black, large text2.23:1WCAG large text: Fail

Named colours

Dim grey · ΔE 24.8Gray · ΔE 31.1Dark slate grey · ΔE 32.2Slate grey · ΔE 34.3Rosy brown · ΔE 34.3Black · ΔE 35.9
Nearest named CSS colourDim grey (#696969)ΔE 24.84, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A645A
Analogous#643A59, #64453A
Triadic#44643A, #3A4464
Split complementary#3A6445, #3A5964
Tetradic#59643A, #3A645A, #453A64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9A1AB
Lighter +30%#B6818E
Lighter +20%#A36171
Lighter +10%#844D5A
Darker −10%#44272E
Darker −20%#231518
Darker −30%#030202
Darker −40%#000000
More saturated +25%#78263A
Less saturated −25%#504E4E

Channel breakdown

R100
G58
B68
Red100 (39.2%)
Green58 (22.7%)
Blue68 (26.7%)
Hue345.71°
Saturation (HSL)26.58%
Lightness30.98%
Dominant channelRed
Hex per channelR 64 · G 3A · B 44

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Every value on this page was computed from “643a44” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.