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Recognised as Colour

#21B228

  • #21B228
  • Green
  • Dark
  • Nearest: Limegreen

#21B228 is a green with RGB values 33, 178, 40 and HSL 123°, 69%, 41%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21B228#21B228
HEX#21B228
RGBrgb(33, 178, 40)
RGB (0–1)0.1294, 0.698, 0.1569
RGB percentages12.9%, 69.8%, 15.7%
HSLhsl(122.9, 68.7%, 41.4%)
HSV / HSBhsv(122.9, 81.5%, 69.8%)
CMYK81.5%, 0%, 77.5%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,208,296
CSS custom property--colour: #21B228;

Brightness & contrast

Relative luminance0.32317WCAG 2.x, 0 is black and 1 is white
Perceived brightness138.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.46:1
Contrast with white2.81:1WCAG normal text: Fail
Contrast with black7.46:1WCAG normal text: AAA
Greyscale equivalent#898989
Inverted#DE4DD7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B6A003no red cones; affects about 1% of men; ΔE 58 from the original
Deuteranopia#A79638no green cones; the most common form, about 1% of men; ΔE 57.1 from the original
Tritanopia#00AD98no blue cones; rare, and affects men and women equally; ΔE 58.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.81:1WCAG large text: Fail
Contrast with black, large text7.46:1WCAG large text: AAA

Named colours

Limegreen · ΔE 11.9Forest green · ΔE 20.8Green · ΔE 20.9Yellow green · ΔE 29.2Spring green · ΔE 30.4Light green · ΔE 33.5
Nearest named CSS colourLimegreen (#32CD32)ΔE 11.89, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B221AB
Analogous#63B221, #21B270
Triadic#2821B2, #B22821
Split complementary#7021B2, #B22163
Tetradic#2163B2, #B221AB, #B27021

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFF0B2
Lighter +30%#84E889
Lighter +20%#59E05F
Lighter +10%#2ED836
Darker −10%#19871E
Darker −20%#115C15
Darker −30%#09310B
Darker −40%#010601
More saturated +25%#07CC10
Less saturated −25%#3B9840

Channel breakdown

R33
G178
B40
Red33 (12.9%)
Green178 (69.8%)
Blue40 (15.7%)
Hue122.9°
Saturation (HSL)68.72%
Lightness41.37%
Dominant channelGreen
Hex per channelR 21 · G B2 · B 28

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Every value on this page was computed from “21b228” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.