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Recognised as Colour

#66DAC6

  • #66DAC6
  • Cyan
  • Light
  • Nearest: Turquoise

#66DAC6 is a cyan with RGB values 102, 218, 198 and HSL 170°, 61%, 63%. It is a light colour, so black text on it reaches 12.4:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#66DAC6#66DAC6
HEX#66DAC6
RGBrgb(102, 218, 198)
RGB (0–1)0.4, 0.8549, 0.7765
RGB percentages40%, 85.5%, 77.6%
HSLhsl(169.7, 61.1%, 62.7%)
HSV / HSBhsv(169.7, 53.2%, 85.5%)
CMYK53.2%, 0%, 9.2%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,740,678
CSS custom property--colour: #66DAC6;

Brightness & contrast

Relative luminance0.57045WCAG 2.x, 0 is black and 1 is white
Perceived brightness188.4 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.41:1
Contrast with white1.69:1WCAG normal text: Fail
Contrast with black12.41:1WCAG normal text: AAA
Greyscale equivalent#C0C0C0
Inverted#992539

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D2CFC5no red cones; affects about 1% of men; ΔE 37.5 from the original
Deuteranopia#BFC1C8no green cones; the most common form, about 1% of men; ΔE 38.5 from the original
Tritanopia#1DDDD4no 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 text1.69:1WCAG large text: Fail
Contrast with black, large text12.41:1WCAG large text: AAA

Named colours

Turquoise · ΔE 7.6Medium turquoise · ΔE 8.9Medium aquamarine · ΔE 9.6Dark turquoise · ΔE 14.4Light seagreen · ΔE 15.7Aquamarine · ΔE 17.3
Nearest named CSS colourTurquoise (#40E0D0)ΔE 7.56, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DA667A
Analogous#66DA8C, #66B4DA
Triadic#C666DA, #DAC666
Split complementary#DA66B4, #DA8C66
Tetradic#8C66DA, #DA667A, #B4DA66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E1F8F4
Lighter +20%#B8EEE5
Lighter +10%#8FE4D5
Darker −10%#3DD0B7
Darker −20%#2AB099
Darker −30%#218675
Darker −40%#175D51
More saturated +25%#4EF2D6
Less saturated −25%#7EC2B6

Channel breakdown

R102
G218
B198
Red102 (40%)
Green218 (85.5%)
Blue198 (77.6%)
Hue169.66°
Saturation (HSL)61.05%
Lightness62.75%
Dominant channelGreen
Hex per channelR 66 · G DA · B C6

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Every value on this page was computed from “66dac6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.