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Recognised as Colour

#21DD18

  • #21DD18
  • Green
  • Light
  • Nearest: Limegreen

#21DD18 is a green with RGB values 33, 221, 24 and HSL 117°, 80%, 48%. It is a light colour, so black text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21DD18#21DD18
HEX#21DD18
RGBrgb(33, 221, 24)
RGB (0–1)0.1294, 0.8667, 0.0941
RGB percentages12.9%, 86.7%, 9.4%
HSLhsl(117.3, 80.4%, 48%)
HSV / HSBhsv(117.3, 89.1%, 86.7%)
CMYK85.1%, 0%, 89.1%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,219,288
CSS custom property--colour: #21DD18;

Brightness & contrast

Relative luminance0.52102WCAG 2.x, 0 is black and 1 is white
Perceived brightness170.5 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.42:1
Contrast with white1.84:1WCAG normal text: Fail
Contrast with black11.42:1WCAG normal text: AAA
Greyscale equivalent#A7A7A7
Inverted#DE22E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#E2C700no red cones; affects about 1% of men; ΔE 69.5 from the original
Deuteranopia#CFBA38no green cones; the most common form, about 1% of men; ΔE 69 from the original
Tritanopia#00D6BCno blue cones; rare, and affects men and women equally; ΔE 76.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.84:1WCAG large text: Fail
Contrast with black, large text11.42:1WCAG large text: AAA

Named colours

Limegreen · ΔE 14.2Lawn green · ΔE 18.7Lime · ΔE 18.8Chartreuse · ΔE 19.8Spring green · ΔE 27.6Green yellow · ΔE 28.6
Nearest named CSS colourLimegreen (#32CD32)ΔE 14.18, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D418DD
Analogous#84DD18, #18DD72
Triadic#1821DD, #DD1821
Split complementary#7118DD, #DD1884
Tetradic#1883DD, #D418DD, #DD7218

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAF9C8
Lighter +30%#9EF49A
Lighter +20%#72EF6C
Lighter +10%#46EA3E
Darker −10%#1AAF13
Darker −20%#13810E
Darker −30%#0C5309
Darker −40%#062504
More saturated +25%#0BF500
Less saturated −25%#3DBE37

Channel breakdown

R33
G221
B24
Red33 (12.9%)
Green221 (86.7%)
Blue24 (9.4%)
Hue117.26°
Saturation (HSL)80.41%
Lightness48.04%
Dominant channelGreen
Hex per channelR 21 · G DD · B 18

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Every value on this page was computed from “21dd18” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.