Recognised as Colour
#288F91
- #288F91
- Cyan
- Dark
- Nearest: Dark cyan
#288F91 is a cyan with RGB values 40, 143, 145 and HSL 181°, 57%, 36%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Dark cyan.
Colour values
#288F91#288F91
HEX#288F91
RGBrgb(40, 143, 145)
RGB (0–1)0.1569, 0.5608, 0.5686
RGB percentages15.7%, 56.1%, 56.9%
HSLhsl(181.1, 56.8%, 36.3%)
HSV / HSBhsv(181.1, 72.4%, 56.9%)
CMYK72.4%, 1.4%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,658,193
CSS custom property--colour: #288F91;
Brightness & contrast
Relative luminance0.2214WCAG 2.x, 0 is black and 1 is white
Perceived brightness122 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.43:1
Contrast with white3.87:1WCAG normal text: Fail
Contrast with black5.43:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#D7706E
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.87:1WCAG large text: AA
Contrast with black, large text5.43:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#912A28
Analogous#28915E, #285B91
Triadic#91288F, #8F9128
Split complementary#91285B, #915E28
Tetradic#5E2891, #912A28, #5B9128
Tints, shades & saturation
Channel breakdown
R40
G143
B145
Red40 (15.7%)
Green143 (56.1%)
Blue145 (56.9%)
Hue181.14°
Saturation (HSL)56.76%
Lightness36.27%
Dominant channelBlue
Hex per channelR 28 · G 8F · B 91
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