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Recognised as Colour

#21FF90

  • #21FF90
  • Cyan
  • Light
  • Nearest: Medium spring green

#21FF90 is a cyan with RGB values 33, 255, 144 and HSL 150°, 100%, 56%. It is a light colour, so black text on it reaches 15.8:1 contrast (AAA for normal text). The nearest named colour is Medium spring green.

Colour values

#21FF90#21FF90
HEX#21FF90
RGBrgb(33, 255, 144)
RGB (0–1)0.1294, 1, 0.5647
RGB percentages12.9%, 100%, 56.5%
HSLhsl(150, 100%, 56.5%)
HSV / HSBhsv(150, 87.1%, 100%)
CMYK87.1%, 0%, 43.5%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,112
CSS custom property--colour: #21FF90;

Brightness & contrast

Relative luminance0.73857WCAG 2.x, 0 is black and 1 is white
Perceived brightness202.1 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 15.77:1
Contrast with white1.33:1WCAG normal text: Fail
Contrast with black15.77:1WCAG normal text: AAA
Greyscale equivalent#C8C8C8
Inverted#DE006F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FFE988no red cones; affects about 1% of men; ΔE 68.7 from the original
Deuteranopia#E7D898no green cones; the most common form, about 1% of men; ΔE 69.1 from the original
Tritanopia#00FCE4no blue cones; rare, and affects men and women equally; ΔE 45.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.33:1WCAG large text: Fail
Contrast with black, large text15.77:1WCAG large text: AAA

Named colours

Medium spring green · ΔE 7.4Spring green · ΔE 8.6Pale green · ΔE 24.7Light green · ΔE 26.8Limegreen · ΔE 28Medium seagreen · ΔE 37.3
Nearest named CSS colourMedium spring green (#00FA9A)ΔE 7.44, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF2190
Analogous#21FF21, #21FFFF
Triadic#9021FF, #FF9021
Split complementary#FF21FF, #FF2121
Tetradic#2121FF, #FF2190, #FFFF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFFF6
Lighter +30%#BAFFDD
Lighter +20%#87FFC3
Lighter +10%#54FFAA
Darker −10%#00ED76
Darker −20%#00BA5D
Darker −30%#008744
Darker −40%#00542A
More saturated +25%#21FF90
Less saturated −25%#3DE390

Channel breakdown

R33
G255
B144
Red33 (12.9%)
Green255 (100%)
Blue144 (56.5%)
Hue150°
Saturation (HSL)100%
Lightness56.47%
Dominant channelGreen
Hex per channelR 21 · G FF · B 90

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Every value on this page was computed from “21ff90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.