Colour
#423C40
- #423C40
- Grey
- Dark
- Nearest: Dark slate grey
#423C40 is a grey with RGB values 66, 60, 64 and HSL 320°, 5%, 25%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#423C40#423C40
HEX#423C40
RGBrgb(66, 60, 64)
RGB (0–1)0.2588, 0.2353, 0.251
RGB percentages25.9%, 23.5%, 25.1%
HSLhsl(320, 4.8%, 24.7%)
HSV / HSBhsv(320, 9.1%, 25.9%)
CMYK0%, 9.1%, 3%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,340,800
CSS custom property--colour: #423C40;
Brightness & contrast
Relative luminance0.0476WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.76:1
Contrast with white10.76:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#BDC3BF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.76:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail
Named colours
Hue familygrey
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3C423E
Analogous#413C42, #423C3D
Triadic#40423C, #3C4042
Split complementary#3D423C, #3C4241
Tetradic#42413C, #3C423E, #3C3D42
Tints, shades & saturation
Channel breakdown
R66
G60
B64
Red66 (25.9%)
Green60 (23.5%)
Blue64 (25.1%)
Hue320°
Saturation (HSL)4.76%
Lightness24.71%
Dominant channelRed
Hex per channelR 42 · G 3C · B 40
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