Recognised as Colour
#643D3B
- #643D3B
- Red
- Dark
- Nearest: Dim grey
#643D3B is a red with RGB values 100, 61, 59 and HSL 3°, 26%, 31%. It is a dark colour, so white text on it reaches 9.2:1 contrast (AAA for normal text). The nearest named colour is Dim grey.
Colour values
#643D3B#643D3B
HEX#643D3B
RGBrgb(100, 61, 59)
RGB (0–1)0.3922, 0.2392, 0.2314
RGB percentages39.2%, 23.9%, 23.1%
HSLhsl(2.9, 25.8%, 31.2%)
HSV / HSBhsv(2.9, 41%, 39.2%)
CMYK0%, 39%, 41%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,275
CSS custom property--colour: #643D3B;
Brightness & contrast
Relative luminance0.06363WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.24:1
Contrast with white9.24:1WCAG normal text: AAA
Contrast with black2.27:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#9BC2C4
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.24:1WCAG large text: AAA
Contrast with black, large text2.27:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3B6264
Analogous#643B4E, #64523B
Triadic#3B643D, #3D3B64
Split complementary#3B6452, #3B4D64
Tetradic#4E643B, #3B6264, #523B64
Tints, shades & saturation
Channel breakdown
R100
G61
B59
Red100 (39.2%)
Green61 (23.9%)
Blue59 (23.1%)
Hue2.93°
Saturation (HSL)25.79%
Lightness31.18%
Dominant channelRed
Hex per channelR 64 · G 3D · B 3B
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