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Recognised as Colour

#66D7D8

  • #66D7D8
  • Cyan
  • Light
  • Nearest: Medium turquoise

#66D7D8 is a cyan with RGB values 102, 215, 216 and HSL 181°, 59%, 62%. It is a light colour, so black text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Medium turquoise.

Colour values

#66D7D8#66D7D8
HEX#66D7D8
RGBrgb(102, 215, 216)
RGB (0–1)0.4, 0.8431, 0.8471
RGB percentages40%, 84.3%, 84.7%
HSLhsl(180.5, 59.4%, 62.4%)
HSV / HSBhsv(180.5, 52.8%, 84.7%)
CMYK52.8%, 0.5%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,739,928
CSS custom property--colour: #66D7D8;

Brightness & contrast

Relative luminance0.56384WCAG 2.x, 0 is black and 1 is white
Perceived brightness188.6 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.28:1
Contrast with white1.71:1WCAG normal text: Fail
Contrast with black12.28:1WCAG normal text: AAA
Greyscale equivalent#BFBFBF
Inverted#992827

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CBCED8no red cones; affects about 1% of men; ΔE 33.1 from the original
Deuteranopia#B8C0D9no green cones; the most common form, about 1% of men; ΔE 34.2 from the original
Tritanopia#00DDD7no blue cones; rare, and affects men and women equally; ΔE 13.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.71:1WCAG large text: Fail
Contrast with black, large text12.28:1WCAG large text: AAA

Named colours

Medium turquoise · ΔE 6.7Dark turquoise · ΔE 10Turquoise · ΔE 14Light seagreen · ΔE 15.7Pale turquoise · ΔE 16.3Powder blue · ΔE 18.9
Nearest named CSS colourMedium turquoise (#48D1CC)ΔE 6.67, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D86766
Analogous#66D8A0, #669ED8
Triadic#D866D7, #D7D866
Split complementary#D8669E, #D8A066
Tetradic#A066D8, #D86766, #9ED866

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E0F7F7
Lighter +20%#B7ECED
Lighter +10%#8FE2E2
Darker −10%#3DCCCE
Darker −20%#2CABAC
Darker −30%#228383
Darker −40%#175A5B
More saturated +25%#4EEFF0
Less saturated −25%#7EBFC0

Channel breakdown

R102
G215
B216
Red102 (40%)
Green215 (84.3%)
Blue216 (84.7%)
Hue180.53°
Saturation (HSL)59.38%
Lightness62.35%
Dominant channelBlue
Hex per channelR 66 · G D7 · B D8

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Every value on this page was computed from “66d7d8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.