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Colour

#66FFCC

  • #66FFCC
  • Cyan
  • Light
  • Nearest: Aquamarine

#66FFCC is a cyan with RGB values 102, 255, 204 and HSL 160°, 100%, 70%. It is a light colour, so black text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.

Colour values

#66FFCC#66FFCC
HEX#66FFCC
HEX (short)#6FC
RGBrgb(102, 255, 204)
RGB (0–1)0.4, 1, 0.8
RGB percentages40%, 100%, 80%
HSLhsl(160, 100%, 70%)
HSV / HSBhsv(160, 60%, 100%)
CMYK60%, 0%, 20%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,750,156
CSS custom property--colour: #66FFCC;

Brightness & contrast

Relative luminance0.78704WCAG 2.x, 0 is black and 1 is white
Perceived brightness214.5 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 16.74:1
Contrast with white1.25:1WCAG normal text: Fail
Contrast with black16.74:1WCAG normal text: AAA
Greyscale equivalent#DBDBDB
Inverted#990033

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#F9EFC9no red cones; affects about 1% of men; ΔE 50.3 from the original
Deuteranopia#E3DFCFno green cones; the most common form, about 1% of men; ΔE 51.2 from the original
Tritanopia#00FFF1no blue cones; rare, and affects men and women equally; ΔE 19.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.25:1WCAG large text: Fail
Contrast with black, large text16.74:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 7.4Turquoise · ΔE 20.9Medium aquamarine · ΔE 21.2Light green · ΔE 25.7Pale green · ΔE 26.4Aqua · ΔE 26.9
Nearest named CSS colourAquamarine (#7FFFD4)ΔE 7.39, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF6699
Analogous#66FF7F, #66E6FF
Triadic#CC66FF, #FFCC66
Split complementary#FF66E5, #FF8066
Tetradic#8066FF, #FF6699, #E5FF66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCFFEE
Lighter +10%#99FFDD
Darker −10%#33FFBB
Darker −20%#00FFAA
Darker −30%#00CC88
Darker −40%#009966
More saturated +25%#66FFCC
Less saturated −25%#79ECC6

Channel breakdown

R102
G255
B204
Red102 (40%)
Green255 (100%)
Blue204 (80%)
Hue160°
Saturation (HSL)100%
Lightness70%
Dominant channelGreen
Hex per channelR 66 · G FF · B CC

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