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Recognised as Colour

#81C500

  • #81C500
  • Green
  • Dark
  • Nearest: Yellow green

#81C500 is a green with RGB values 129, 197, 0 and HSL 81°, 100%, 39%. It is a dark colour, so black text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Yellow green.

Colour values

#81C500#81C500
HEX#81C500
RGBrgb(129, 197, 0)
RGB (0–1)0.5059, 0.7725, 0
RGB percentages50.6%, 77.3%, 0%
HSLhsl(80.7, 100%, 38.6%)
HSV / HSBhsv(80.7, 100%, 77.3%)
CMYK34.5%, 0%, 100%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,504,576
CSS custom property--colour: #81C500;

Brightness & contrast

Relative luminance0.446WCAG 2.x, 0 is black and 1 is white
Perceived brightness166.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.92:1
Contrast with white2.12:1WCAG normal text: Fail
Contrast with black9.92:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#7E3AFF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CFB500no red cones; affects about 1% of men; ΔE 40.2 from the original
Deuteranopia#C5B128no green cones; the most common form, about 1% of men; ΔE 39 from the original
Tritanopia#85BCA7no blue cones; rare, and affects men and women equally; ΔE 71.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.12:1WCAG large text: Fail
Contrast with black, large text9.92:1WCAG large text: AAA

Named colours

Yellow green · ΔE 10.1Green yellow · ΔE 22.7Limegreen · ΔE 24.4Lawn green · ΔE 30.5Chartreuse · ΔE 31.5Olivedrab · ΔE 33.6
Nearest named CSS colourYellow green (#9ACD32)ΔE 10.14, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4400C5
Analogous#C5A700, #1EC500
Triadic#0081C5, #C50081
Split complementary#001EC5, #A600C5
Tetradic#00C5A7, #4400C5, #C5001F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D9FF92
Lighter +30%#C8FF5F
Lighter +20%#B6FF2C
Lighter +10%#A2F800
Darker −10%#609200
Darker −20%#3E5F00
Darker −30%#1D2C00
Darker −40%#000000
More saturated +25%#81C500
Less saturated −25%#79AC19

Channel breakdown

R129
G197
B0
Red129 (50.6%)
Green197 (77.3%)
Blue0 (0%)
Hue80.71°
Saturation (HSL)100%
Lightness38.63%
Dominant channelGreen
Hex per channelR 81 · G C5 · B 00

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Every value on this page was computed from “81c500” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.