Colour
#21564E
- #21564E
- Cyan
- Dark
- Nearest: Dark slate grey
#21564E is a cyan with RGB values 33, 86, 78 and HSL 171°, 45%, 23%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#21564E#21564E
HEX#21564E
RGBrgb(33, 86, 78)
RGB (0–1)0.1294, 0.3373, 0.3059
RGB percentages12.9%, 33.7%, 30.6%
HSLhsl(170.9, 44.5%, 23.3%)
HSV / HSBhsv(170.9, 61.6%, 33.7%)
CMYK61.6%, 0%, 9.3%, 66.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,184,782
CSS custom property--colour: #21564E;
Brightness & contrast
Relative luminance0.07529WCAG 2.x, 0 is black and 1 is white
Perceived brightness73.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.38:1
Contrast with white8.38:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#DEA9B1
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.38:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#562129
Analogous#215633, #214456
Triadic#4E2156, #564E21
Split complementary#562143, #563321
Tetradic#332156, #562129, #445621
Tints, shades & saturation
Channel breakdown
R33
G86
B78
Red33 (12.9%)
Green86 (33.7%)
Blue78 (30.6%)
Hue170.94°
Saturation (HSL)44.54%
Lightness23.33%
Dominant channelGreen
Hex per channelR 21 · G 56 · B 4E
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