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Recognised as Colour

#21DD6D

  • #21DD6D
  • Green
  • Light
  • Nearest: Medium spring green

#21DD6D is a green with RGB values 33, 221, 109 and HSL 144°, 74%, 50%. It is a light colour, so black text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Medium spring green.

Colour values

#21DD6D#21DD6D
HEX#21DD6D
RGBrgb(33, 221, 109)
RGB (0–1)0.1294, 0.8667, 0.4275
RGB percentages12.9%, 86.7%, 42.7%
HSLhsl(144.3, 74%, 49.8%)
HSV / HSBhsv(144.3, 85.1%, 86.7%)
CMYK85.1%, 0%, 50.7%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,219,373
CSS custom property--colour: #21DD6D;

Brightness & contrast

Relative luminance0.5314WCAG 2.x, 0 is black and 1 is white
Perceived brightness174.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.63:1
Contrast with white1.81:1WCAG normal text: Fail
Contrast with black11.63:1WCAG normal text: AAA
Greyscale equivalent#ADADAD
Inverted#DE2292

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#DEC963no red cones; affects about 1% of men; ΔE 63.1 from the original
Deuteranopia#CABB75no green cones; the most common form, about 1% of men; ΔE 63.2 from the original
Tritanopia#00D9C3no blue cones; rare, and affects men and women equally; ΔE 48 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.81:1WCAG large text: Fail
Contrast with black, large text11.63:1WCAG large text: AAA

Named colours

Medium spring green · ΔE 14.2Spring green · ΔE 14.8Limegreen · ΔE 19.6Pale green · ΔE 23.4Light green · ΔE 23.5Medium seagreen · ΔE 29.4
Nearest named CSS colourMedium spring green (#00FA9A)ΔE 14.17, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD2191
Analogous#33DD21, #21DDCB
Triadic#6D21DD, #DD6D21
Split complementary#CB21DD, #DD2133
Tetradic#2133DD, #DD2191, #DDCB21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2F8E1
Lighter +30%#A5F2C4
Lighter +20%#79EBA7
Lighter +10%#4DE48A
Darker −10%#1AB157
Darker −20%#148441
Darker −30%#0D582B
Darker −40%#062C15
More saturated +25%#01FD67
Less saturated −25%#41BD73

Channel breakdown

R33
G221
B109
Red33 (12.9%)
Green221 (86.7%)
Blue109 (42.7%)
Hue144.26°
Saturation (HSL)74.02%
Lightness49.8%
Dominant channelGreen
Hex per channelR 21 · G DD · B 6D

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Every value on this page was computed from “21dd6d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.