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Recognised as Colour

#21B728

  • #21B728
  • Green
  • Dark
  • Nearest: Limegreen

#21B728 is a green with RGB values 33, 183, 40 and HSL 123°, 69%, 42%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21B728#21B728
HEX#21B728
RGBrgb(33, 183, 40)
RGB (0–1)0.1294, 0.7176, 0.1569
RGB percentages12.9%, 71.8%, 15.7%
HSLhsl(122.8, 69.4%, 42.4%)
HSV / HSBhsv(122.8, 82%, 71.8%)
CMYK82%, 0%, 78.1%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,209,576
CSS custom property--colour: #21B728;

Brightness & contrast

Relative luminance0.34344WCAG 2.x, 0 is black and 1 is white
Perceived brightness142 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.87:1
Contrast with white2.67:1WCAG normal text: Fail
Contrast with black7.87:1WCAG normal text: AAA
Greyscale equivalent#8D8D8D
Inverted#DE48D7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BBA500no red cones; affects about 1% of men; ΔE 59.1 from the original
Deuteranopia#AB9A39no green cones; the most common form, about 1% of men; ΔE 58.4 from the original
Tritanopia#00B29Cno blue cones; rare, and affects men and women equally; ΔE 60.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.67:1WCAG large text: Fail
Contrast with black, large text7.87:1WCAG large text: AAA

Named colours

Limegreen · ΔE 9.2Green · ΔE 23.5Forest green · ΔE 23.6Spring green · ΔE 28.8Yellow green · ΔE 29.2Light green · ΔE 34.1
Nearest named CSS colourLimegreen (#32CD32)ΔE 9.24, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B721B0
Analogous#65B721, #21B773
Triadic#2821B7, #B72821
Split complementary#7321B7, #B72165
Tetradic#2165B7, #B721B0, #B77321

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B3F1B6
Lighter +30%#88E98C
Lighter +20%#5CE263
Lighter +10%#31DA39
Darker −10%#198C1F
Darker −20%#116115
Darker −30%#0A350C
Darker −40%#020A02
More saturated +25%#06D210
Less saturated −25%#3C9C40

Channel breakdown

R33
G183
B40
Red33 (12.9%)
Green183 (71.8%)
Blue40 (15.7%)
Hue122.8°
Saturation (HSL)69.44%
Lightness42.35%
Dominant channelGreen
Hex per channelR 21 · G B7 · B 28

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Every value on this page was computed from “21b728” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.