Colour
#183D36
- #183D36
- Cyan
- Dark
- Nearest: Dark slate grey
#183D36 is a cyan with RGB values 24, 61, 54 and HSL 169°, 44%, 17%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#183D36#183D36
HEX#183D36
RGBrgb(24, 61, 54)
RGB (0–1)0.0941, 0.2392, 0.2118
RGB percentages9.4%, 23.9%, 21.2%
HSLhsl(168.6, 43.5%, 16.7%)
HSV / HSBhsv(168.6, 60.7%, 23.9%)
CMYK60.7%, 0%, 11.5%, 76.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,588,534
CSS custom property--colour: #183D36;
Brightness & contrast
Relative luminance0.03798WCAG 2.x, 0 is black and 1 is white
Perceived brightness51.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.93:1
Contrast with white11.93:1WCAG normal text: AAA
Contrast with black1.76:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#E7C2C9
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.93:1WCAG large text: AAA
Contrast with black, large text1.76:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3D181F
Analogous#183D24, #18323D
Triadic#36183D, #3D3618
Split complementary#3D1832, #3D2418
Tetradic#23183D, #3D181F, #323D18
Tints, shades & saturation
Channel breakdown
R24
G61
B54
Red24 (9.4%)
Green61 (23.9%)
Blue54 (21.2%)
Hue168.65°
Saturation (HSL)43.53%
Lightness16.67%
Dominant channelGreen
Hex per channelR 18 · G 3D · B 36
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page