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Recognised as Colour

#66D400

  • #66D400
  • Green
  • Dark
  • Nearest: Limegreen

#66D400 is a green with RGB values 102, 212, 0 and HSL 91°, 100%, 42%. It is a dark colour, so black text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#66D400#66D400
HEX#66D400
RGBrgb(102, 212, 0)
RGB (0–1)0.4, 0.8314, 0
RGB percentages40%, 83.1%, 0%
HSLhsl(91.1, 100%, 41.6%)
HSV / HSBhsv(91.1, 100%, 83.1%)
CMYK51.9%, 0%, 100%, 16.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,738,944
CSS custom property--colour: #66D400;

Brightness & contrast

Relative luminance0.49912WCAG 2.x, 0 is black and 1 is white
Perceived brightness171.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.98:1
Contrast with white1.91:1WCAG normal text: Fail
Contrast with black10.98:1WCAG normal text: AAA
Greyscale equivalent#ADADAD
Inverted#992BFF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#DCC100no red cones; affects about 1% of men; ΔE 54.4 from the original
Deuteranopia#CEB82Dno green cones; the most common form, about 1% of men; ΔE 54 from the original
Tritanopia#60CCB4no blue cones; rare, and affects men and women equally; ΔE 75.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.91:1WCAG large text: Fail
Contrast with black, large text10.98:1WCAG large text: AAA

Named colours

Limegreen · ΔE 15.3Lawn green · ΔE 18.4Green yellow · ΔE 19.1Chartreuse · ΔE 19.6Yellow green · ΔE 23.3Lime · ΔE 30
Nearest named CSS colourLimegreen (#32CD32)ΔE 15.32, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6E00D4
Analogous#D0D400, #00D404
Triadic#0066D4, #D40066
Split complementary#0400D4, #D400D0
Tetradic#00D0D4, #6E00D4, #D40400

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CEFFA1
Lighter +30%#B4FF6E
Lighter +20%#99FF3B
Lighter +10%#7FFF08
Darker −10%#4DA100
Darker −20%#356E00
Darker −30%#1C3B00
Darker −40%#040800
More saturated +25%#66D400
Less saturated −25%#67BA1B

Channel breakdown

R102
G212
B0
Red102 (40%)
Green212 (83.1%)
Blue0 (0%)
Hue91.13°
Saturation (HSL)100%
Lightness41.57%
Dominant channelGreen
Hex per channelR 66 · G D4 · B 00

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Every value on this page was computed from “66d400” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.