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Recognised as Colour

#81B9C5

  • #81B9C5
  • Cyan
  • Dark
  • Nearest: Sky blue

#81B9C5 is a cyan with RGB values 129, 185, 197 and HSL 191°, 37%, 64%. It is a dark colour, so black text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#81B9C5#81B9C5
HEX#81B9C5
RGBrgb(129, 185, 197)
RGB (0–1)0.5059, 0.7255, 0.7725
RGB percentages50.6%, 72.5%, 77.3%
HSLhsl(190.6, 37%, 63.9%)
HSV / HSBhsv(190.6, 34.5%, 77.3%)
CMYK34.5%, 6.1%, 0%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,501,701
CSS custom property--colour: #81B9C5;

Brightness & contrast

Relative luminance0.43396WCAG 2.x, 0 is black and 1 is white
Perceived brightness171.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.68:1
Contrast with white2.17:1WCAG normal text: Fail
Contrast with black9.68:1WCAG normal text: AAA
Greyscale equivalent#AEAEAE
Inverted#7E463A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#AFB5C6no red cones; affects about 1% of men; ΔE 16.8 from the original
Deuteranopia#A4ACC5no green cones; the most common form, about 1% of men; ΔE 17.7 from the original
Tritanopia#68BEBDno blue cones; rare, and affects men and women equally; ΔE 11.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.17:1WCAG large text: Fail
Contrast with black, large text9.68:1WCAG large text: AAA

Named colours

Sky blue · ΔE 12Cadetblue · ΔE 12.4Light blue · ΔE 12.7Powder blue · ΔE 14.9Light steelblue · ΔE 15.8Light skyblue · ΔE 18.9
Nearest named CSS colourSky blue (#87CEEB)ΔE 11.96, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C58D81
Analogous#81C5AF, #8197C5
Triadic#C581B9, #B9C581
Split complementary#C58197, #C5AF81
Tetradic#AF81C5, #C58D81, #97C581

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EAF3F5
Lighter +20%#C7E0E5
Lighter +10%#A4CCD5
Darker −10%#5EA6B5
Darker −20%#478B99
Darker −30%#376B76
Darker −40%#264C54
More saturated +25%#6AC8DC
Less saturated −25%#98AAAE

Channel breakdown

R129
G185
B197
Red129 (50.6%)
Green185 (72.5%)
Blue197 (77.3%)
Hue190.59°
Saturation (HSL)36.96%
Lightness63.92%
Dominant channelBlue
Hex per channelR 81 · G B9 · B C5

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Every value on this page was computed from “81b9c5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.