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Recognised as Colour

#21CA09

  • #21CA09
  • Green
  • Dark
  • Nearest: Limegreen

#21CA09 is a green with RGB values 33, 202, 9 and HSL 113°, 91%, 41%. It is a dark colour, so black text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21CA09#21CA09
HEX#21CA09
RGBrgb(33, 202, 9)
RGB (0–1)0.1294, 0.7922, 0.0353
RGB percentages12.9%, 79.2%, 3.5%
HSLhsl(112.5, 91.5%, 41.4%)
HSV / HSBhsv(112.5, 95.5%, 79.2%)
CMYK83.7%, 0%, 95.5%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,214,409
CSS custom property--colour: #21CA09;

Brightness & contrast

Relative luminance0.42584WCAG 2.x, 0 is black and 1 is white
Perceived brightness155.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.52:1
Contrast with white2.21:1WCAG normal text: Fail
Contrast with black9.52:1WCAG normal text: AAA
Greyscale equivalent#989898
Inverted#DE35F6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CFB600no red cones; affects about 1% of men; ΔE 64.8 from the original
Deuteranopia#BEAA2Eno green cones; the most common form, about 1% of men; ΔE 64.6 from the original
Tritanopia#00C4ABno blue cones; rare, and affects men and women equally; ΔE 72.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.21:1WCAG large text: Fail
Contrast with black, large text9.52:1WCAG large text: AAA

Named colours

Limegreen · ΔE 8.3Lawn green · ΔE 23.8Chartreuse · ΔE 25.1Lime · ΔE 27Spring green · ΔE 28.8Green yellow · ΔE 30
Nearest named CSS colourLimegreen (#32CD32)ΔE 8.34, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B209CA
Analogous#82CA09, #09CA51
Triadic#0921CA, #CA0921
Split complementary#5109CA, #CA0982
Tetradic#0982CA, #B209CA, #CA5109

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFFBA4
Lighter +30%#84F973
Lighter +20%#59F742
Lighter +10%#2EF412
Darker −10%#199907
Darker −20%#116805
Darker −30%#093802
Darker −40%#010700
More saturated +25%#1AD300
Less saturated −25%#35B023

Channel breakdown

R33
G202
B9
Red33 (12.9%)
Green202 (79.2%)
Blue9 (3.5%)
Hue112.54°
Saturation (HSL)91.47%
Lightness41.37%
Dominant channelGreen
Hex per channelR 21 · G CA · B 09

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Every value on this page was computed from “21ca09” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.