Colour
#3F3F42
- #3F3F42
- Grey
- Dark
- Nearest: Dark slate grey
#3F3F42 is a grey with RGB values 63, 63, 66 and HSL 240°, 2%, 25%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#3F3F42#3F3F42
HEX#3F3F42
RGBrgb(63, 63, 66)
RGB (0–1)0.2471, 0.2471, 0.2588
RGB percentages24.7%, 24.7%, 25.9%
HSLhsl(240, 2.3%, 25.3%)
HSV / HSBhsv(240, 4.5%, 25.9%)
CMYK4.5%, 4.5%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,144,962
CSS custom property--colour: #3F3F42;
Brightness & contrast
Relative luminance0.05005WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.49:1
Contrast with white10.49:1WCAG normal text: AAA
Contrast with black2:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#C0C0BD
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.49:1WCAG large text: AAA
Contrast with black, large text2:1WCAG large text: Fail
Named colours
Hue familygrey
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#42423F
Analogous#3F4142, #413F42
Triadic#423F3F, #3F423F
Split complementary#42413F, #41423F
Tetradic#423F41, #42423F, #3F4241
Tints, shades & saturation
Channel breakdown
R63
G63
B66
Red63 (24.7%)
Green63 (24.7%)
Blue66 (25.9%)
Hue240°
Saturation (HSL)2.33%
Lightness25.29%
Dominant channelBlue
Hex per channelR 3F · G 3F · B 42
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