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Recognised as Colour

#255B63

  • #255B63
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#255B63 is a cyan with RGB values 37, 91, 99 and HSL 188°, 46%, 27%. It is a dark colour, so white text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#255B63#255B63
HEX#255B63
RGBrgb(37, 91, 99)
RGB (0–1)0.1451, 0.3569, 0.3882
RGB percentages14.5%, 35.7%, 38.8%
HSLhsl(187.7, 45.6%, 26.7%)
HSV / HSBhsv(187.7, 62.6%, 38.8%)
CMYK62.6%, 8.1%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,448,227
CSS custom property--colour: #255B63;

Brightness & contrast

Relative luminance0.08776WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.62:1
Contrast with white7.62:1WCAG normal text: AAA
Contrast with black2.76:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#DAA49C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#535864no red cones; affects about 1% of men; ΔE 16.2 from the original
Deuteranopia#4A5163no green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#005F5Dno blue cones; rare, and affects men and women equally; ΔE 9.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.62:1WCAG large text: AAA
Contrast with black, large text2.76:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 8.3Teal · ΔE 18.8Dim grey · ΔE 20.1Slate grey · ΔE 21.6Dark cyan · ΔE 22.8Light slate grey · ΔE 24.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 8.28, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#632D25
Analogous#25634C, #253C63
Triadic#63255B, #5B6325
Split complementary#63253C, #634C25
Tetradic#4C2563, #632D25, #3C6325

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#83C7D1
Lighter +30%#5EB6C3
Lighter +20%#419FAD
Lighter +10%#337D88
Darker −10%#17393E
Darker −20%#091719
Darker −30%#000000
Darker −40%#000000
More saturated +25%#146874
Less saturated −25%#364E52

Channel breakdown

R37
G91
B99
Red37 (14.5%)
Green91 (35.7%)
Blue99 (38.8%)
Hue187.74°
Saturation (HSL)45.59%
Lightness26.67%
Dominant channelBlue
Hex per channelR 25 · G 5B · B 63

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Every value on this page was computed from “255b63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.