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Recognised as Colour

#21FFA5

  • #21FFA5
  • Cyan
  • Light
  • Nearest: Medium spring green

#21FFA5 is a cyan with RGB values 33, 255, 165 and HSL 156°, 100%, 56%. It is a light colour, so black text on it reaches 15.9:1 contrast (AAA for normal text). The nearest named colour is Medium spring green.

Colour values

#21FFA5#21FFA5
HEX#21FFA5
RGBrgb(33, 255, 165)
RGB (0–1)0.1294, 1, 0.6471
RGB percentages12.9%, 100%, 64.7%
HSLhsl(155.7, 100%, 56.5%)
HSV / HSBhsv(155.7, 87.1%, 100%)
CMYK87.1%, 0%, 35.3%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,133
CSS custom property--colour: #21FFA5;

Brightness & contrast

Relative luminance0.7456WCAG 2.x, 0 is black and 1 is white
Perceived brightness204 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 15.91:1
Contrast with white1.32:1WCAG normal text: Fail
Contrast with black15.91:1WCAG normal text: AAA
Greyscale equivalent#C9C9C9
Inverted#DE005A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#FCEA9Fno red cones; affects about 1% of men; ΔE 65.4 from the original
Deuteranopia#E5D9ABno green cones; the most common form, about 1% of men; ΔE 66.3 from the original
Tritanopia#00FDE8no blue cones; rare, and affects men and women equally; ΔE 36.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.32:1WCAG large text: Fail
Contrast with black, large text15.91:1WCAG large text: AAA

Named colours

Medium spring green · ΔE 3.9Spring green · ΔE 19.3Pale green · ΔE 22.7Light green · ΔE 24Aquamarine · ΔE 30.8Medium seagreen · ΔE 32.1
Nearest named CSS colourMedium spring green (#00FA9A)ΔE 3.91, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF217B
Analogous#21FF36, #21EAFF
Triadic#A521FF, #FFA521
Split complementary#FF21EA, #FF3621
Tetradic#3621FF, #FF217B, #EAFF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFFF8
Lighter +30%#BAFFE3
Lighter +20%#87FFCE
Lighter +10%#54FFBA
Darker −10%#00ED8D
Darker −20%#00BA6F
Darker −30%#008750
Darker −40%#005432
More saturated +25%#21FFA5
Less saturated −25%#3DE3A0

Channel breakdown

R33
G255
B165
Red33 (12.9%)
Green255 (100%)
Blue165 (64.7%)
Hue155.68°
Saturation (HSL)100%
Lightness56.47%
Dominant channelGreen
Hex per channelR 21 · G FF · B A5

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Every value on this page was computed from “21ffa5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.