Recognised as Colour
#255B5A
- #255B5A
- Cyan
- Dark
- Nearest: Dark slate grey
#255B5A is a cyan with RGB values 37, 91, 90 and HSL 179°, 42%, 25%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#255B5A#255B5A
HEX#255B5A
RGBrgb(37, 91, 90)
RGB (0–1)0.1451, 0.3569, 0.3529
RGB percentages14.5%, 35.7%, 35.3%
HSLhsl(178.9, 42.2%, 25.1%)
HSV / HSBhsv(178.9, 59.3%, 35.7%)
CMYK59.3%, 0%, 1.1%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,448,218
CSS custom property--colour: #255B5A;
Brightness & contrast
Relative luminance0.08614WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.71:1
Contrast with white7.71:1WCAG normal text: AAA
Contrast with black2.72:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#DAA4A5
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.71:1WCAG large text: AAA
Contrast with black, large text2.72:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#5B2526
Analogous#255B3F, #25415B
Triadic#5A255B, #5B5A25
Split complementary#5B2541, #5B3F25
Tetradic#3F255B, #5B2526, #415B25
Tints, shades & saturation
Channel breakdown
R37
G91
B90
Red37 (14.5%)
Green91 (35.7%)
Blue90 (35.3%)
Hue178.89°
Saturation (HSL)42.19%
Lightness25.1%
Dominant channelGreen
Hex per channelR 25 · G 5B · B 5A
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