Recognised as Colour
#288B74
- #288B74
- Cyan
- Dark
- Nearest: Dark cyan
#288B74 is a cyan with RGB values 40, 139, 116 and HSL 166°, 55%, 35%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Dark cyan.
Colour values
#288B74#288B74
HEX#288B74
RGBrgb(40, 139, 116)
RGB (0–1)0.1569, 0.5451, 0.4549
RGB percentages15.7%, 54.5%, 45.5%
HSLhsl(166.1, 55.3%, 35.1%)
HSV / HSBhsv(166.1, 71.2%, 54.5%)
CMYK71.2%, 0%, 16.5%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,657,140
CSS custom property--colour: #288B74;
Brightness & contrast
Relative luminance0.20177WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.04:1
Contrast with white4.17:1WCAG normal text: Fail
Contrast with black5.04:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#D7748B
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.17:1WCAG large text: AA
Contrast with black, large text5.04:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#8B283F
Analogous#288B42, #28718B
Triadic#74288B, #8B7428
Split complementary#8B2871, #8B4228
Tetradic#42288B, #8B283F, #718B28
Tints, shades & saturation
Channel breakdown
R40
G139
B116
Red40 (15.7%)
Green139 (54.5%)
Blue116 (45.5%)
Hue166.06°
Saturation (HSL)55.31%
Lightness35.1%
Dominant channelGreen
Hex per channelR 28 · G 8B · B 74
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