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Colour

#66CBC9

  • #66CBC9
  • Cyan
  • Dark
  • Nearest: Medium turquoise

#66CBC9 is a cyan with RGB values 102, 203, 201 and HSL 179°, 49%, 60%. It is a dark colour, so black text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Medium turquoise.

Colour values

#66CBC9#66CBC9
HEX#66CBC9
RGBrgb(102, 203, 201)
RGB (0–1)0.4, 0.7961, 0.7882
RGB percentages40%, 79.6%, 78.8%
HSLhsl(178.8, 49.3%, 59.8%)
HSV / HSBhsv(178.8, 49.8%, 79.6%)
CMYK49.8%, 0%, 1%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,736,841
CSS custom property--colour: #66CBC9;

Brightness & contrast

Relative luminance0.49754WCAG 2.x, 0 is black and 1 is white
Perceived brightness178.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.95:1
Contrast with white1.92:1WCAG normal text: Fail
Contrast with black10.95:1WCAG normal text: AAA
Greyscale equivalent#B5B5B5
Inverted#993436

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C0C3C9no red cones; affects about 1% of men; ΔE 30.5 from the original
Deuteranopia#AFB6CAno green cones; the most common form, about 1% of men; ΔE 31.7 from the original
Tritanopia#23D0CAno blue cones; rare, and affects men and women equally; ΔE 11.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.92:1WCAG large text: Fail
Contrast with black, large text10.95:1WCAG large text: AAA

Named colours

Medium turquoise · ΔE 7.5Dark turquoise · ΔE 11.5Light seagreen · ΔE 12.8Turquoise · ΔE 15.7Pale turquoise · ΔE 17.5Cadetblue · ΔE 18
Nearest named CSS colourMedium turquoise (#48D1CC)ΔE 7.55, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB6668
Analogous#66CB97, #669ACB
Triadic#C966CB, #CBC966
Split complementary#CB669B, #CB9766
Tetradic#9766CB, #CB6668, #9ACB66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FEFFFF
Lighter +30%#D8F2F1
Lighter +20%#B2E5E4
Lighter +10%#8CD8D6
Darker −10%#40BEBB
Darker −20%#339896
Darker −30%#277170
Darker −40%#1A4B4A
More saturated +25%#4CE5E2
Less saturated −25%#80B1B0

Channel breakdown

R102
G203
B201
Red102 (40%)
Green203 (79.6%)
Blue201 (78.8%)
Hue178.81°
Saturation (HSL)49.27%
Lightness59.8%
Dominant channelGreen
Hex per channelR 66 · G CB · B C9

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Every value on this page was computed from “66cbc9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.