Recognised as Colour
#17918A
- #17918A
- Cyan
- Dark
- Nearest: Dark cyan
#17918A is a cyan with RGB values 23, 145, 138 and HSL 177°, 73%, 33%. 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
#17918A#17918A
HEX#17918A
RGBrgb(23, 145, 138)
RGB (0–1)0.0902, 0.5686, 0.5412
RGB percentages9%, 56.9%, 54.1%
HSLhsl(176.6, 72.6%, 32.9%)
HSV / HSBhsv(176.6, 84.1%, 56.9%)
CMYK84.1%, 0%, 4.8%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,544,586
CSS custom property--colour: #17918A;
Brightness & contrast
Relative luminance0.22268WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.45:1
Contrast with white3.85:1WCAG normal text: Fail
Contrast with black5.45:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#E86E75
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.85:1WCAG large text: AA
Contrast with black, large text5.45:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#91171E
Analogous#17914D, #175B91
Triadic#8A1791, #918A17
Split complementary#91175B, #914D17
Tetradic#4D1791, #91171E, #5B9117
Tints, shades & saturation
Channel breakdown
R23
G145
B138
Red23 (9%)
Green145 (56.9%)
Blue138 (54.1%)
Hue176.56°
Saturation (HSL)72.62%
Lightness32.94%
Dominant channelGreen
Hex per channelR 17 · G 91 · B 8A
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