Colour
#155B66
- #155B66
- Cyan
- Dark
- Nearest: Dark slate grey
#155B66 is a cyan with RGB values 21, 91, 102 and HSL 188°, 66%, 24%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#155B66#155B66
HEX#155B66
RGBrgb(21, 91, 102)
RGB (0–1)0.0824, 0.3569, 0.4
RGB percentages8.2%, 35.7%, 40%
HSLhsl(188.1, 65.9%, 24.1%)
HSV / HSBhsv(188.1, 79.4%, 40%)
CMYK79.4%, 10.8%, 0%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,399,654
CSS custom property--colour: #155B66;
Brightness & contrast
Relative luminance0.08601WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.72:1
Contrast with white7.72:1WCAG normal text: AAA
Contrast with black2.72:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#EAA499
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.72:1WCAG large text: AAA
Contrast with black, large text2.72:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#662015
Analogous#156649, #153266
Triadic#66155B, #5B6615
Split complementary#661533, #664915
Tetradic#481566, #662015, #326615
Tints, shades & saturation
Channel breakdown
R21
G91
B102
Red21 (8.2%)
Green91 (35.7%)
Blue102 (40%)
Hue188.15°
Saturation (HSL)65.85%
Lightness24.12%
Dominant channelBlue
Hex per channelR 15 · G 5B · B 66
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