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Recognised as Colour

#51A366

  • #51A366
  • Green
  • Dark
  • Nearest: Sea green

#51A366 is a green with RGB values 81, 163, 102 and HSL 135°, 34%, 48%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#51A366#51A366
HEX#51A366
RGBrgb(81, 163, 102)
RGB (0–1)0.3176, 0.6392, 0.4
RGB percentages31.8%, 63.9%, 40%
HSLhsl(135.4, 33.6%, 47.8%)
HSV / HSBhsv(135.4, 50.3%, 63.9%)
CMYK50.3%, 0%, 37.4%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,350,246
CSS custom property--colour: #51A366;

Brightness & contrast

Relative luminance0.28903WCAG 2.x, 0 is black and 1 is white
Perceived brightness136.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.78:1
Contrast with white3.1:1WCAG normal text: Fail
Contrast with black6.78:1WCAG normal text: AA
Greyscale equivalent#8D8D8D
Inverted#AE5C99

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A49762no red cones; affects about 1% of men; ΔE 36.2 from the original
Deuteranopia#988F6Ano green cones; the most common form, about 1% of men; ΔE 36.3 from the original
Tritanopia#40A194no blue cones; rare, and affects men and women equally; ΔE 26.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.1:1WCAG large text: AA
Contrast with black, large text6.78:1WCAG large text: AAA

Named colours

Sea green · ΔE 10.1Medium seagreen · ΔE 10.5Dark seagreen · ΔE 19.8Medium aquamarine · ΔE 21.9Forest green · ΔE 25.5Dark olivegreen · ΔE 27.9
Nearest named CSS colourSea green (#2E8B57)ΔE 10.11, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A3518E
Analogous#65A351, #51A38F
Triadic#6651A3, #A36651
Split complementary#8F51A3, #A35165
Tetradic#5165A3, #A3518E, #A38F51

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D6EADB
Lighter +30%#B4D9BD
Lighter +20%#91C9A0
Lighter +10%#6FB882
Darker −10%#408151
Darker −20%#2F5F3B
Darker −30%#1E3D26
Darker −40%#0D1B11
More saturated +25%#33C157
Less saturated −25%#6F8475

Channel breakdown

R81
G163
B102
Red81 (31.8%)
Green163 (63.9%)
Blue102 (40%)
Hue135.37°
Saturation (HSL)33.61%
Lightness47.84%
Dominant channelGreen
Hex per channelR 51 · G A3 · B 66

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Every value on this page was computed from “51a366” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.