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Recognised as Colour

#21BB33

  • #21BB33
  • Green
  • Dark
  • Nearest: Limegreen

#21BB33 is a green with RGB values 33, 187, 51 and HSL 127°, 70%, 43%. It is a dark colour, so black text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21BB33#21BB33
HEX#21BB33
RGBrgb(33, 187, 51)
RGB (0–1)0.1294, 0.7333, 0.2
RGB percentages12.9%, 73.3%, 20%
HSLhsl(127, 70%, 43.1%)
HSV / HSBhsv(127, 82.4%, 73.3%)
CMYK82.4%, 0%, 72.7%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,210,611
CSS custom property--colour: #21BB33;

Brightness & contrast

Relative luminance0.36103WCAG 2.x, 0 is black and 1 is white
Perceived brightness145.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.22:1
Contrast with white2.55:1WCAG normal text: Fail
Contrast with black8.22:1WCAG normal text: AAA
Greyscale equivalent#909090
Inverted#DE44CC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BFA91Bno red cones; affects about 1% of men; ΔE 59.5 from the original
Deuteranopia#AE9E41no green cones; the most common form, about 1% of men; ΔE 58.4 from the original
Tritanopia#00B6A0no blue cones; rare, and affects men and women equally; ΔE 58.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.55:1WCAG large text: Fail
Contrast with black, large text8.22:1WCAG large text: AAA

Named colours

Limegreen · ΔE 9.5Forest green · ΔE 23.5Green · ΔE 24.2Spring green · ΔE 26.8Yellow green · ΔE 29.9Medium spring green · ΔE 31.4
Nearest named CSS colourLimegreen (#32CD32)ΔE 9.47, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB21A9
Analogous#5CBB21, #21BB80
Triadic#3321BB, #BB3321
Split complementary#8021BB, #BB215C
Tetradic#215CBB, #BB21A9, #BB8021

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B6F2BD
Lighter +30%#8BEA96
Lighter +20%#5FE36F
Lighter +10%#34DB47
Darker −10%#199027
Darker −20%#12641B
Darker −30%#0A3910
Darker −40%#020E04
More saturated +25%#06D61E
Less saturated −25%#3DA048

Channel breakdown

R33
G187
B51
Red33 (12.9%)
Green187 (73.3%)
Blue51 (20%)
Hue127.01°
Saturation (HSL)70%
Lightness43.14%
Dominant channelGreen
Hex per channelR 21 · G BB · B 33

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Every value on this page was computed from “21bb33” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.