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Colour

#643C3C

  • #643C3C
  • Red
  • Dark
  • Nearest: Dim grey

#643C3C is a red with RGB values 100, 60, 60 and HSL 0°, 25%, 31%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#643C3C#643C3C
HEX#643C3C
RGBrgb(100, 60, 60)
RGB (0–1)0.3922, 0.2353, 0.2353
RGB percentages39.2%, 23.5%, 23.5%
HSLhsl(0, 25%, 31.4%)
HSV / HSBhsv(0, 40%, 39.2%)
CMYK0%, 40%, 40%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,020
CSS custom property--colour: #643C3C;

Brightness & contrast

Relative luminance0.06267WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.32:1
Contrast with white9.32:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#9BC3C3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#44423Cno red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#4E4A3Bno green cones; the most common form, about 1% of men; ΔE 19 from the original
Tritanopia#6B373Cno 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 text9.32:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dim grey · ΔE 23.9Gray · ΔE 30.3Dark slate grey · ΔE 31.4Sienna · ΔE 33.5Rosy brown · ΔE 33.5Slate grey · ΔE 35.1
Nearest named CSS colourDim grey (#696969)ΔE 23.9, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3C6464
Analogous#643C50, #64503C
Triadic#3C643C, #3C3C64
Split complementary#3C6450, #3C5064
Tetradic#50643C, #3C6464, #503C64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8A4A4
Lighter +30%#B58484
Lighter +20%#A26464
Lighter +10%#844F4F
Darker −10%#442929
Darker −20%#241616
Darker −30%#040303
Darker −40%#000000
More saturated +25%#782828
Less saturated −25%#505050

Channel breakdown

R100
G60
B60
Red100 (39.2%)
Green60 (23.5%)
Blue60 (23.5%)
Hue0°
Saturation (HSL)25%
Lightness31.37%
Dominant channelRed
Hex per channelR 64 · G 3C · B 3C

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Every value on this page was computed from “643c3c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.