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Colour

#66CC9B

  • #66CC9B
  • Cyan
  • Dark
  • Nearest: Medium aquamarine

#66CC9B is a cyan with RGB values 102, 204, 155 and HSL 151°, 50%, 60%. It is a dark colour, so black text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Medium aquamarine.

Colour values

#66CC9B#66CC9B
HEX#66CC9B
RGBrgb(102, 204, 155)
RGB (0–1)0.4, 0.8, 0.6078
RGB percentages40%, 80%, 60.8%
HSLhsl(151.2, 50%, 60%)
HSV / HSBhsv(151.2, 50%, 80%)
CMYK50%, 0%, 24%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,737,051
CSS custom property--colour: #66CC9B;

Brightness & contrast

Relative luminance0.48377WCAG 2.x, 0 is black and 1 is white
Perceived brightness174 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.68:1
Contrast with white1.97:1WCAG normal text: Fail
Contrast with black10.68:1WCAG normal text: AAA
Greyscale equivalent#B3B3B3
Inverted#993364

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CABF98no red cones; affects about 1% of men; ΔE 39.3 from the original
Deuteranopia#BAB49Eno green cones; the most common form, about 1% of men; ΔE 39.7 from the original
Tritanopia#46CBBEno blue cones; rare, and affects men and women equally; ΔE 19.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.97:1WCAG large text: Fail
Contrast with black, large text10.68:1WCAG large text: AAA

Named colours

Medium aquamarine · ΔE 7.7Medium seagreen · ΔE 15Dark seagreen · ΔE 17.8Aquamarine · ΔE 18.4Turquoise · ΔE 20.7Light seagreen · ΔE 23.9
Nearest named CSS colourMedium aquamarine (#66CDAA)ΔE 7.69, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CC6697
Analogous#66CC68, #66CACC
Triadic#9B66CC, #CC9B66
Split complementary#CC66CA, #CC6866
Tetradic#6866CC, #CC6697, #CACC66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9F2E6
Lighter +20%#B3E6CD
Lighter +10%#8CD9B4
Darker −10%#40BF82
Darker −20%#339968
Darker −30%#26734E
Darker −40%#1A4D34
More saturated +25%#4DE69C
Less saturated −25%#80B39A

Channel breakdown

R102
G204
B155
Red102 (40%)
Green204 (80%)
Blue155 (60.8%)
Hue151.18°
Saturation (HSL)50%
Lightness60%
Dominant channelGreen
Hex per channelR 66 · G CC · B 9B

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Every value on this page was computed from “66cc9b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.