Colour
#1B3D3F
- #1B3D3F
- Cyan
- Dark
- Nearest: Dark slate grey
#1B3D3F is a cyan with RGB values 27, 61, 63 and HSL 183°, 40%, 18%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#1B3D3F#1B3D3F
HEX#1B3D3F
RGBrgb(27, 61, 63)
RGB (0–1)0.1059, 0.2392, 0.2471
RGB percentages10.6%, 23.9%, 24.7%
HSLhsl(183.3, 40%, 17.6%)
HSV / HSBhsv(183.3, 57.1%, 24.7%)
CMYK57.1%, 3.2%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,785,151
CSS custom property--colour: #1B3D3F;
Brightness & contrast
Relative luminance0.03929WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.76:1
Contrast with white11.76:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#E4C2C0
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.76:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3F1D1B
Analogous#1B3F2F, #1B2B3F
Triadic#3F1B3D, #3D3F1B
Split complementary#3F1B2B, #3F2F1B
Tetradic#2F1B3F, #3F1D1B, #2B3F1B
Tints, shades & saturation
Channel breakdown
R27
G61
B63
Red27 (10.6%)
Green61 (23.9%)
Blue63 (24.7%)
Hue183.33°
Saturation (HSL)40%
Lightness17.65%
Dominant channelBlue
Hex per channelR 1B · G 3D · B 3F
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