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Recognised as Colour

#A9FF51

  • #A9FF51
  • Green
  • Light
  • Nearest: Green yellow

#A9FF51 is a green with RGB values 169, 255, 81 and HSL 90°, 100%, 66%. It is a light colour, so black text on it reaches 17.1:1 contrast (AAA for normal text). The nearest named colour is Green yellow.

Colour values

#A9FF51#A9FF51
HEX#A9FF51
RGBrgb(169, 255, 81)
RGB (0–1)0.6627, 1, 0.3176
RGB percentages66.3%, 100%, 31.8%
HSLhsl(89.7, 100%, 65.9%)
HSV / HSBhsv(89.7, 68.2%, 100%)
CMYK33.7%, 0%, 68.2%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,140,945
CSS custom property--colour: #A9FF51;

Brightness & contrast

Relative luminance0.80549WCAG 2.x, 0 is black and 1 is white
Perceived brightness217.8 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 17.11:1
Contrast with white1.23:1WCAG normal text: Fail
Contrast with black17.11:1WCAG normal text: AAA
Greyscale equivalent#E0E0E0
Inverted#5600AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFEC36no red cones; affects about 1% of men; ΔE 42.1 from the original
Deuteranopia#FEE660no green cones; the most common form, about 1% of men; ΔE 45.4 from the original
Tritanopia#ABF5DCno blue cones; rare, and affects men and women equally; ΔE 70.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.23:1WCAG large text: Fail
Contrast with black, large text17.11:1WCAG large text: AAA

Named colours

Green yellow · ΔE 10.4Lawn green · ΔE 21Yellow green · ΔE 21.4Chartreuse · ΔE 21.5Limegreen · ΔE 26.4Pale green · ΔE 33.2
Nearest named CSS colourGreen yellow (#ADFF2F)ΔE 10.43, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A751FF
Analogous#FFFE51, #52FF51
Triadic#51A9FF, #FF51A9
Split complementary#5152FF, #FE51FF
Tetradic#51FFFE, #A751FF, #FF5152

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#F5FFEA
Lighter +20%#DBFFB7
Lighter +10%#C2FF84
Darker −10%#90FF1E
Darker −20%#76EA00
Darker −30%#5DB700
Darker −40%#438400
More saturated +25%#A9FF51
Less saturated −25%#A9E967

Channel breakdown

R169
G255
B81
Red169 (66.3%)
Green255 (100%)
Blue81 (31.8%)
Hue89.66°
Saturation (HSL)100%
Lightness65.88%
Dominant channelGreen
Hex per channelR A9 · G FF · B 51

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Every value on this page was computed from “a9ff51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.