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Recognised as Colour

#66E3D1

  • #66E3D1
  • Cyan
  • Light
  • Nearest: Turquoise

#66E3D1 is a cyan with RGB values 102, 227, 209 and HSL 171°, 69%, 65%. It is a light colour, so black text on it reaches 13.5:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#66E3D1#66E3D1
HEX#66E3D1
RGBrgb(102, 227, 209)
RGB (0–1)0.4, 0.8902, 0.8196
RGB percentages40%, 89%, 82%
HSLhsl(171.4, 69.1%, 64.5%)
HSV / HSBhsv(171.4, 55.1%, 89%)
CMYK55.1%, 0%, 7.9%, 11%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,742,993
CSS custom property--colour: #66E3D1;

Brightness & contrast

Relative luminance0.62366WCAG 2.x, 0 is black and 1 is white
Perceived brightness195.8 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 13.47:1
Contrast with white1.56:1WCAG normal text: Fail
Contrast with black13.47:1WCAG normal text: AAA
Greyscale equivalent#C7C7C7
Inverted#991C2E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#DAD7D0no red cones; affects about 1% of men; ΔE 39.4 from the original
Deuteranopia#C6C9D3no green cones; the most common form, about 1% of men; ΔE 40.1 from the original
Tritanopia#00E7DDno blue cones; rare, and affects men and women equally; ΔE 10.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.56:1WCAG large text: Fail
Contrast with black, large text13.47:1WCAG large text: AAA

Named colours

Turquoise · ΔE 5.8Medium turquoise · ΔE 9.2Medium aquamarine · ΔE 12.5Dark turquoise · ΔE 14.2Aquamarine · ΔE 15.9Aqua · ΔE 17.3
Nearest named CSS colourTurquoise (#40E0D0)ΔE 5.81, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E36678
Analogous#66E393, #66B6E3
Triadic#D166E3, #E3D166
Split complementary#E366B6, #E39366
Tetradic#9266E3, #E36678, #B6E366

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E7FBF8
Lighter +20%#BCF3EB
Lighter +10%#91EBDE
Darker −10%#3BDBC4
Darker −20%#23C0A9
Darker −30%#1B9583
Darker −40%#136A5D
More saturated +25%#4FFAE1
Less saturated −25%#7DCCC1

Channel breakdown

R102
G227
B209
Red102 (40%)
Green227 (89%)
Blue209 (82%)
Hue171.36°
Saturation (HSL)69.06%
Lightness64.51%
Dominant channelGreen
Hex per channelR 66 · G E3 · B D1

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Every value on this page was computed from “66e3d1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.