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Recognised as Colour

#66DDCD

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

#66DDCD is a cyan with RGB values 102, 221, 205 and HSL 172°, 64%, 63%. It is a light colour, so black text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Turquoise.

Colour values

#66DDCD#66DDCD
HEX#66DDCD
RGBrgb(102, 221, 205)
RGB (0–1)0.4, 0.8667, 0.8039
RGB percentages40%, 86.7%, 80.4%
HSLhsl(171.9, 63.6%, 63.3%)
HSV / HSBhsv(171.9, 53.8%, 86.7%)
CMYK53.8%, 0%, 7.2%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,741,453
CSS custom property--colour: #66DDCD;

Brightness & contrast

Relative luminance0.58945WCAG 2.x, 0 is black and 1 is white
Perceived brightness191.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.79:1
Contrast with white1.64:1WCAG normal text: Fail
Contrast with black12.79:1WCAG normal text: AAA
Greyscale equivalent#C3C3C3
Inverted#992232

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D4D2CCno red cones; affects about 1% of men; ΔE 37.5 from the original
Deuteranopia#C1C4CFno green cones; the most common form, about 1% of men; ΔE 38.6 from the original
Tritanopia#07E1D8no blue cones; rare, and affects men and women equally; ΔE 10.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.64:1WCAG large text: Fail
Contrast with black, large text12.79:1WCAG large text: AAA

Named colours

Turquoise · ΔE 7Medium turquoise · ΔE 7.4Medium aquamarine · ΔE 12.1Dark turquoise · ΔE 13Light seagreen · ΔE 16Aquamarine · ΔE 18.1
Nearest named CSS colourTurquoise (#40E0D0)ΔE 6.97, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD6676
Analogous#66DD92, #66B1DD
Triadic#CD66DD, #DDCD66
Split complementary#DD66B1, #DD9266
Tetradic#9266DD, #DD6676, #B1DD66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E3F9F6
Lighter +20%#B9F0E8
Lighter +10%#90E6DB
Darker −10%#3CD4BF
Darker −20%#28B5A2
Darker −30%#1F8B7D
Darker −40%#166157
More saturated +25%#4FF4DE
Less saturated −25%#7DC6BC

Channel breakdown

R102
G221
B205
Red102 (40%)
Green221 (86.7%)
Blue205 (80.4%)
Hue171.93°
Saturation (HSL)63.64%
Lightness63.33%
Dominant channelGreen
Hex per channelR 66 · G DD · B CD

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