Recognised as Colour
#288D9E
- #288D9E
- Cyan
- Dark
- Nearest: Dark cyan
#288D9E is a cyan with RGB values 40, 141, 158 and HSL 189°, 60%, 39%. 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
#288D9E#288D9E
HEX#288D9E
RGBrgb(40, 141, 158)
RGB (0–1)0.1569, 0.5529, 0.6196
RGB percentages15.7%, 55.3%, 62%
HSLhsl(188.6, 59.6%, 38.8%)
HSV / HSBhsv(188.6, 74.7%, 62%)
CMYK74.7%, 10.8%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,657,694
CSS custom property--colour: #288D9E;
Brightness & contrast
Relative luminance0.21969WCAG 2.x, 0 is black and 1 is white
Perceived brightness122.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.39:1
Contrast with white3.89:1WCAG normal text: Fail
Contrast with black5.39:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#D77261
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.89:1WCAG large text: AA
Contrast with black, large text5.39:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#9E3928
Analogous#289E74, #28529E
Triadic#9E288D, #8D9E28
Split complementary#9E2852, #9E7428
Tetradic#74289E, #9E3928, #529E28
Tints, shades & saturation
Channel breakdown
R40
G141
B158
Red40 (15.7%)
Green141 (55.3%)
Blue158 (62%)
Hue188.64°
Saturation (HSL)59.6%
Lightness38.82%
Dominant channelBlue
Hex per channelR 28 · G 8D · B 9E
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