Colour
#181F1F
- #181F1F
- Cyan
- Dark
- Nearest: Black
#181F1F is a cyan with RGB values 24, 31, 31 and HSL 180°, 13%, 11%. It is a dark colour, so white text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#181F1F#181F1F
HEX#181F1F
RGBrgb(24, 31, 31)
RGB (0–1)0.0941, 0.1216, 0.1216
RGB percentages9.4%, 12.2%, 12.2%
HSLhsl(180, 12.7%, 10.8%)
HSV / HSBhsv(180, 22.6%, 12.2%)
CMYK22.6%, 0%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,831
CSS custom property--colour: #181F1F;
Brightness & contrast
Relative luminance0.01273WCAG 2.x, 0 is black and 1 is white
Perceived brightness29.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.74:1
Contrast with white16.74:1WCAG normal text: AAA
Contrast with black1.25:1WCAG normal text: Fail
Greyscale equivalent#1E1E1E
Inverted#E7E0E0
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.74:1WCAG large text: AAA
Contrast with black, large text1.25:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#1F1818
Analogous#181F1C, #181C1F
Triadic#1F181F, #1F1F18
Split complementary#1F181C, #1F1C18
Tetradic#1C181F, #1F1818, #1C1F18
Tints, shades & saturation
Channel breakdown
R24
G31
B31
Red24 (9.4%)
Green31 (12.2%)
Blue31 (12.2%)
Hue180°
Saturation (HSL)12.73%
Lightness10.78%
Dominant channelGreen and Blue
Hex per channelR 18 · G 1F · B 1F
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