Recognised as Colour
#378F91
- #378F91
- Cyan
- Dark
- Nearest: Dark cyan
#378F91 is a cyan with RGB values 55, 143, 145 and HSL 181°, 45%, 39%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Dark cyan.
Colour values
#378F91#378F91
HEX#378F91
RGBrgb(55, 143, 145)
RGB (0–1)0.2157, 0.5608, 0.5686
RGB percentages21.6%, 56.1%, 56.9%
HSLhsl(181.3, 45%, 39.2%)
HSV / HSBhsv(181.3, 62.1%, 56.9%)
CMYK62.1%, 1.4%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,641,233
CSS custom property--colour: #378F91;
Brightness & contrast
Relative luminance0.22501WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.5:1
Contrast with white3.82:1WCAG normal text: Fail
Contrast with black5.5:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#C8706E
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.82:1WCAG large text: AA
Contrast with black, large text5.5:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#913937
Analogous#379166, #376291
Triadic#91378F, #8F9137
Split complementary#913762, #916637
Tetradic#663791, #913937, #629137
Tints, shades & saturation
Channel breakdown
R55
G143
B145
Red55 (21.6%)
Green143 (56.1%)
Blue145 (56.9%)
Hue181.33°
Saturation (HSL)45%
Lightness39.22%
Dominant channelBlue
Hex per channelR 37 · G 8F · B 91
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