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Recognised as Colour

#81B1BB

  • #81B1BB
  • Cyan
  • Dark
  • Nearest: Cadetblue

#81B1BB is a cyan with RGB values 129, 177, 187 and HSL 190°, 30%, 62%. It is a dark colour, so black text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Cadetblue.

Colour values

#81B1BB#81B1BB
HEX#81B1BB
RGBrgb(129, 177, 187)
RGB (0–1)0.5059, 0.6941, 0.7333
RGB percentages50.6%, 69.4%, 73.3%
HSLhsl(190.3, 29.9%, 62%)
HSV / HSBhsv(190.3, 31%, 73.3%)
CMYK31%, 5.3%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,499,643
CSS custom property--colour: #81B1BB;

Brightness & contrast

Relative luminance0.39699WCAG 2.x, 0 is black and 1 is white
Perceived brightness165.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.94:1
Contrast with white2.35:1WCAG normal text: Fail
Contrast with black8.94:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#7E4E44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A9ADBCno red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#9FA6BBno green cones; the most common form, about 1% of men; ΔE 15.4 from the original
Tritanopia#6DB6B4no blue cones; rare, and affects men and women equally; ΔE 10.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.35:1WCAG large text: Fail
Contrast with black, large text8.94:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 10.6Light blue · ΔE 14.8Sky blue · ΔE 14.9Light steelblue · ΔE 16Dark grey · ΔE 16.9Powder blue · ΔE 17
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 10.61, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB8B81
Analogous#81BBA8, #8194BB
Triadic#BB81B1, #B1BB81
Split complementary#BB8194, #BBA881
Tetradic#A881BB, #BB8B81, #94BB81

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E4EFF1
Lighter +20%#C3DADF
Lighter +10%#A2C6CD
Darker −10%#609CA9
Darker −20%#4B808B
Darker −30%#39616A
Darker −40%#274349
More saturated +25%#69C1D3
Less saturated −25%#99A1A3

Channel breakdown

R129
G177
B187
Red129 (50.6%)
Green177 (69.4%)
Blue187 (73.3%)
Hue190.34°
Saturation (HSL)29.9%
Lightness61.96%
Dominant channelBlue
Hex per channelR 81 · G B1 · B BB

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Every value on this page was computed from “81b1bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.