Recognised as Colour
#643F36
- #643F36
- Red
- Dark
- Nearest: Dim grey
#643F36 is a red with RGB values 100, 63, 54 and HSL 12°, 30%, 30%. 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
#643F36#643F36
HEX#643F36
RGBrgb(100, 63, 54)
RGB (0–1)0.3922, 0.2471, 0.2118
RGB percentages39.2%, 24.7%, 21.2%
HSLhsl(11.7, 29.9%, 30.2%)
HSV / HSBhsv(11.7, 46%, 39.2%)
CMYK0%, 37%, 46%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,782
CSS custom property--colour: #643F36;
Brightness & contrast
Relative luminance0.06531WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.11:1
Contrast with white9.11:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#9BC0C9
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.11:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#365B64
Analogous#643644, #645636
Triadic#36643F, #3F3664
Split complementary#366456, #364464
Tetradic#446436, #365B64, #563664
Tints, shades & saturation
Channel breakdown
R100
G63
B54
Red100 (39.2%)
Green63 (24.7%)
Blue54 (21.2%)
Hue11.74°
Saturation (HSL)29.87%
Lightness30.2%
Dominant channelRed
Hex per channelR 64 · G 3F · B 36
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