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Recognised as Colour

#66CF8B

  • #66CF8B
  • Green
  • Dark
  • Nearest: Medium seagreen

#66CF8B is a green with RGB values 102, 207, 139 and HSL 141°, 52%, 61%. It is a dark colour, so black text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Medium seagreen.

Colour values

#66CF8B#66CF8B
HEX#66CF8B
RGBrgb(102, 207, 139)
RGB (0–1)0.4, 0.8118, 0.5451
RGB percentages40%, 81.2%, 54.5%
HSLhsl(141.1, 52.2%, 60.6%)
HSV / HSBhsv(141.1, 50.7%, 81.2%)
CMYK50.7%, 0%, 32.9%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,737,803
CSS custom property--colour: #66CF8B;

Brightness & contrast

Relative luminance0.49315WCAG 2.x, 0 is black and 1 is white
Perceived brightness174.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.86:1
Contrast with white1.93:1WCAG normal text: Fail
Contrast with black10.86:1WCAG normal text: AAA
Greyscale equivalent#B4B4B4
Inverted#993074

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CFC187no red cones; affects about 1% of men; ΔE 42.5 from the original
Deuteranopia#C0B68Fno green cones; the most common form, about 1% of men; ΔE 43.1 from the original
Tritanopia#4CCDBDno blue cones; rare, and affects men and women equally; ΔE 28 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.93:1WCAG large text: Fail
Contrast with black, large text10.86:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 10.7Light green · ΔE 16.4Medium aquamarine · ΔE 17.9Pale green · ΔE 20.6Aquamarine · ΔE 22.2Dark seagreen · ΔE 23
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 10.72, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CF66AA
Analogous#76CF66, #66CFBF
Triadic#8B66CF, #CF8B66
Split complementary#BF66CF, #CF6676
Tetradic#6676CF, #CF66AA, #CFBF66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DAF4E3
Lighter +20%#B4E7C6
Lighter +10%#8DDBA8
Darker −10%#3FC36E
Darker −20%#319E58
Darker −30%#257742
Darker −40%#19502C
More saturated +25%#4DE884
Less saturated −25%#7FB692

Channel breakdown

R102
G207
B139
Red102 (40%)
Green207 (81.2%)
Blue139 (54.5%)
Hue141.14°
Saturation (HSL)52.24%
Lightness60.59%
Dominant channelGreen
Hex per channelR 66 · G CF · B 8B

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Every value on this page was computed from “66cf8b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.