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Recognised as Colour

#21B209

  • #21B209
  • Green
  • Dark
  • Nearest: Limegreen

#21B209 is a green with RGB values 33, 178, 9 and HSL 111°, 90%, 37%. It is a dark colour, so black text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21B209#21B209
HEX#21B209
RGBrgb(33, 178, 9)
RGB (0–1)0.1294, 0.698, 0.0353
RGB percentages12.9%, 69.8%, 3.5%
HSLhsl(111.5, 90.4%, 36.7%)
HSV / HSBhsv(111.5, 94.9%, 69.8%)
CMYK81.5%, 0%, 94.9%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,208,265
CSS custom property--colour: #21B209;

Brightness & contrast

Relative luminance0.32184WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.44:1
Contrast with white2.82:1WCAG normal text: Fail
Contrast with black7.44:1WCAG normal text: AAA
Greyscale equivalent#878787
Inverted#DE4DF6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#B6A000no red cones; affects about 1% of men; ΔE 58.2 from the original
Deuteranopia#A79628no green cones; the most common form, about 1% of men; ΔE 57.8 from the original
Tritanopia#00AC97no blue cones; rare, and affects men and women equally; ΔE 65.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.82:1WCAG large text: Fail
Contrast with black, large text7.44:1WCAG large text: AAA

Named colours

Limegreen · ΔE 10Green · ΔE 24.4Forest green · ΔE 25.8Yellow green · ΔE 28.6Spring green · ΔE 32.5Lawn green · ΔE 34.1
Nearest named CSS colourLimegreen (#32CD32)ΔE 10.01, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A09B2
Analogous#76B209, #09B245
Triadic#0921B2, #B20921
Split complementary#4509B2, #B20976
Tetradic#0976B2, #9A09B2, #B24509

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9DF98E
Lighter +30%#73F75D
Lighter +20%#49F42D
Lighter +10%#2AE30B
Darker −10%#188107
Darker −20%#0F5104
Darker −30%#062002
Darker −40%#000000
More saturated +25%#1BBB00
Less saturated −25%#329B20

Channel breakdown

R33
G178
B9
Red33 (12.9%)
Green178 (69.8%)
Blue9 (3.5%)
Hue111.48°
Saturation (HSL)90.37%
Lightness36.67%
Dominant channelGreen
Hex per channelR 21 · G B2 · B 09

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Every value on this page was computed from “21b209” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.