Recognised as Colour
#00515B
- #00515B
- Cyan
- Dark
- Nearest: Dark slate grey
#00515B is a cyan with RGB values 0, 81, 91 and HSL 187°, 100%, 18%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#00515B#00515B
HEX#00515B
RGBrgb(0, 81, 91)
RGB (0–1)0, 0.3176, 0.3569
RGB percentages0%, 31.8%, 35.7%
HSLhsl(186.6, 100%, 17.8%)
HSV / HSBhsv(186.6, 100%, 35.7%)
CMYK100%, 11%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer20,827
CSS custom property--colour: #00515B;
Brightness & contrast
Relative luminance0.0664WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.02:1
Contrast with white9.02:1WCAG normal text: AAA
Contrast with black2.33:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#FFAEA4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.02:1WCAG large text: AAA
Contrast with black, large text2.33:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#5B0A00
Analogous#005B38, #00235B
Triadic#5B0051, #515B00
Split complementary#5B0023, #5B3800
Tetradic#38005B, #5B0A00, #235B00
Tints, shades & saturation
Channel breakdown
R0
G81
B91
Red0 (0%)
Green81 (31.8%)
Blue91 (35.7%)
Hue186.59°
Saturation (HSL)100%
Lightness17.84%
Dominant channelBlue
Hex per channelR 00 · G 51 · B 5B
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