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Recognised as Colour

#21CC51

  • #21CC51
  • Green
  • Dark
  • Nearest: Limegreen

#21CC51 is a green with RGB values 33, 204, 81 and HSL 137°, 72%, 46%. It is a dark colour, so black text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

Colour values

#21CC51#21CC51
HEX#21CC51
RGBrgb(33, 204, 81)
RGB (0–1)0.1294, 0.8, 0.3176
RGB percentages12.9%, 80%, 31.8%
HSLhsl(136.8, 72.2%, 46.5%)
HSV / HSBhsv(136.8, 83.8%, 80%)
CMYK83.8%, 0%, 60.3%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,214,993
CSS custom property--colour: #21CC51;

Brightness & contrast

Relative luminance0.44103WCAG 2.x, 0 is black and 1 is white
Perceived brightness159.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.82:1
Contrast with white2.14:1WCAG normal text: Fail
Contrast with black9.82:1WCAG normal text: AAA
Greyscale equivalent#9F9F9F
Inverted#DE33AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CFB944no red cones; affects about 1% of men; ΔE 61.6 from the original
Deuteranopia#BDAC5Bno green cones; the most common form, about 1% of men; ΔE 61.6 from the original
Tritanopia#00C7B2no blue cones; rare, and affects men and women equally; ΔE 53.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.14:1WCAG large text: Fail
Contrast with black, large text9.82:1WCAG large text: AAA

Named colours

Limegreen · ΔE 12.7Spring green · ΔE 19.7Medium spring green · ΔE 22.8Light green · ΔE 26.9Forest green · ΔE 27.4Pale green · ΔE 27.5
Nearest named CSS colourLimegreen (#32CD32)ΔE 12.67, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CC219C
Analogous#46CC21, #21CCA7
Triadic#5121CC, #CC5121
Split complementary#A621CC, #CC2146
Tetradic#2146CC, #CC219C, #CCA721

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4F5D2
Lighter +30%#98EEB0
Lighter +20%#6CE78E
Lighter +10%#40E06D
Darker −10%#1AA040
Darker −20%#13742E
Darker −30%#0C481D
Darker −40%#051C0B
More saturated +25%#03EA44
Less saturated −25%#3FAE5E

Channel breakdown

R33
G204
B81
Red33 (12.9%)
Green204 (80%)
Blue81 (31.8%)
Hue136.84°
Saturation (HSL)72.15%
Lightness46.47%
Dominant channelGreen
Hex per channelR 21 · G CC · B 51

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Every value on this page was computed from “21cc51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.