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Recognised as Colour

#21BD59

  • #21BD59
  • Green
  • Dark
  • Nearest: Medium seagreen

#21BD59 is a green with RGB values 33, 189, 89 and HSL 142°, 70%, 44%. It is a dark colour, so black text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Medium seagreen.

Colour values

#21BD59#21BD59
HEX#21BD59
RGBrgb(33, 189, 89)
RGB (0–1)0.1294, 0.7412, 0.349
RGB percentages12.9%, 74.1%, 34.9%
HSLhsl(141.5, 70.3%, 43.5%)
HSV / HSBhsv(141.5, 82.5%, 74.1%)
CMYK82.5%, 0%, 52.9%, 25.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,211,161
CSS custom property--colour: #21BD59;

Brightness & contrast

Relative luminance0.3744WCAG 2.x, 0 is black and 1 is white
Perceived brightness149 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.49:1
Contrast with white2.47:1WCAG normal text: Fail
Contrast with black8.49:1WCAG normal text: AAA
Greyscale equivalent#959595
Inverted#DE42A6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BEAC50no red cones; affects about 1% of men; ΔE 55.7 from the original
Deuteranopia#AEA061no green cones; the most common form, about 1% of men; ΔE 56.3 from the original
Tritanopia#00B9A6no blue cones; rare, and affects men and women equally; ΔE 44.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.47:1WCAG large text: Fail
Contrast with black, large text8.49:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 19.3Forest green · ΔE 20.6Light green · ΔE 23.4Medium spring green · ΔE 23.6Limegreen · ΔE 23.6Green · ΔE 25.1
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 19.33, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BD2185
Analogous#37BD21, #21BDA7
Triadic#5921BD, #BD5921
Split complementary#A721BD, #BD2137
Tetradic#2137BD, #BD2185, #BDA721

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B7F3CD
Lighter +30%#8CEBAE
Lighter +20%#61E390
Lighter +10%#35DC71
Darker −10%#199245
Darker −20%#126630
Darker −30%#0A3B1C
Darker −40%#030F07
More saturated +25%#05D951
Less saturated −25%#3DA161

Channel breakdown

R33
G189
B89
Red33 (12.9%)
Green189 (74.1%)
Blue89 (34.9%)
Hue141.54°
Saturation (HSL)70.27%
Lightness43.53%
Dominant channelGreen
Hex per channelR 21 · G BD · B 59

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Every value on this page was computed from “21bd59” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.