Recognised as Colour
#15403C
- #15403C
- Cyan
- Dark
- Nearest: Dark slate grey
#15403C is a cyan with RGB values 21, 64, 60 and HSL 174°, 51%, 17%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#15403C#15403C
HEX#15403C
RGBrgb(21, 64, 60)
RGB (0–1)0.0824, 0.251, 0.2353
RGB percentages8.2%, 25.1%, 23.5%
HSLhsl(174.4, 50.6%, 16.7%)
HSV / HSBhsv(174.4, 67.2%, 25.1%)
CMYK67.2%, 0%, 6.2%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,392,700
CSS custom property--colour: #15403C;
Brightness & contrast
Relative luminance0.04152WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.47:1
Contrast with white11.47:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#EABFC3
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.47:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#401519
Analogous#154027, #152E40
Triadic#3C1540, #403C15
Split complementary#40152E, #402715
Tetradic#271540, #401519, #2E4015
Tints, shades & saturation
Channel breakdown
R21
G64
B60
Red21 (8.2%)
Green64 (25.1%)
Blue60 (23.5%)
Hue174.42°
Saturation (HSL)50.59%
Lightness16.67%
Dominant channelGreen
Hex per channelR 15 · G 40 · B 3C
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