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Recognised as Colour

#21FF37

  • #21FF37
  • Green
  • Light
  • Nearest: Lime

#21FF37 is a green with RGB values 33, 255, 55 and HSL 126°, 100%, 56%. It is a light colour, so black text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Lime.

Colour values

#21FF37#21FF37
HEX#21FF37
RGBrgb(33, 255, 55)
RGB (0–1)0.1294, 1, 0.2157
RGB percentages12.9%, 100%, 21.6%
HSLhsl(125.9, 100%, 56.5%)
HSV / HSBhsv(125.9, 87.1%, 100%)
CMYK87.1%, 0%, 78.4%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,023
CSS custom property--colour: #21FF37;

Brightness & contrast

Relative luminance0.72119WCAG 2.x, 0 is black and 1 is white
Perceived brightness197.1 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 15.42:1
Contrast with white1.36:1WCAG normal text: Fail
Contrast with black15.42:1WCAG normal text: AAA
Greyscale equivalent#C1C1C1
Inverted#DE00C8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFE600no red cones; affects about 1% of men; ΔE 75.2 from the original
Deuteranopia#EED750no green cones; the most common form, about 1% of men; ΔE 76.5 from the original
Tritanopia#00F8DAno blue cones; rare, and affects men and women equally; ΔE 79.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.36:1WCAG large text: Fail
Contrast with black, large text15.42:1WCAG large text: AAA

Named colours

Lime · ΔE 9Lawn green · ΔE 18.3Chartreuse · ΔE 18.7Limegreen · ΔE 25.9Spring green · ΔE 28.4Green yellow · ΔE 31.6
Nearest named CSS colourLime (#00FF00)ΔE 9, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF21E9
Analogous#7AFF21, #21FFA6
Triadic#3721FF, #FF3721
Split complementary#A621FF, #FF217A
Tetradic#217AFF, #FF21E9, #FFA621

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFFEF
Lighter +30%#BAFFC1
Lighter +20%#87FF93
Lighter +10%#54FF65
Darker −10%#00ED17
Darker −20%#00BA12
Darker −30%#00870D
Darker −40%#005408
More saturated +25%#21FF37
Less saturated −25%#3DE34D

Channel breakdown

R33
G255
B55
Red33 (12.9%)
Green255 (100%)
Blue55 (21.6%)
Hue125.95°
Saturation (HSL)100%
Lightness56.47%
Dominant channelGreen
Hex per channelR 21 · G FF · B 37

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Every value on this page was computed from “21ff37” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.