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Colour

#81B3B3

  • #81B3B3
  • Cyan
  • Dark
  • Nearest: Cadetblue

#81B3B3 is a cyan with RGB values 129, 179, 179 and HSL 180°, 25%, 60%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Cadetblue.

Colour values

#81B3B3#81B3B3
HEX#81B3B3
RGBrgb(129, 179, 179)
RGB (0–1)0.5059, 0.702, 0.702
RGB percentages50.6%, 70.2%, 70.2%
HSLhsl(180, 24.8%, 60.4%)
HSV / HSBhsv(180, 27.9%, 70.2%)
CMYK27.9%, 0%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,500,147
CSS custom property--colour: #81B3B3;

Brightness & contrast

Relative luminance0.40162WCAG 2.x, 0 is black and 1 is white
Perceived brightness165.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.03:1
Contrast with white2.32:1WCAG normal text: Fail
Contrast with black9.03:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#7E4C4C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#ADAEB3no red cones; affects about 1% of men; ΔE 17.3 from the original
Deuteranopia#A3A7B3no green cones; the most common form, about 1% of men; ΔE 17.4 from the original
Tritanopia#6FB6B3no blue cones; rare, and affects men and women equally; ΔE 6.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.32:1WCAG large text: Fail
Contrast with black, large text9.03:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 9.3Light blue · ΔE 16.4Powder blue · ΔE 16.9Dark grey · ΔE 17.2Sky blue · ΔE 18.7Silver · ΔE 19
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 9.29, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B38181
Analogous#81B39A, #819AB3
Triadic#B381B3, #B3B381
Split complementary#B3819A, #B39A81
Tetradic#9A81B3, #B38181, #9AB381

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E0EDED
Lighter +20%#C1D9D9
Lighter +10%#A1C6C6
Darker −10%#61A0A0
Darker −20%#4E8080
Darker −30%#3A6161
Darker −40%#274141
More saturated +25%#68CCCC
Less saturated −25%#9A9A9A

Channel breakdown

R129
G179
B179
Red129 (50.6%)
Green179 (70.2%)
Blue179 (70.2%)
Hue180°
Saturation (HSL)24.75%
Lightness60.39%
Dominant channelGreen and Blue
Hex per channelR 81 · G B3 · B B3

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Every value on this page was computed from “81b3b3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.