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Recognised as Colour

#21FFCD

  • #21FFCD
  • Cyan
  • Light
  • Nearest: Aquamarine

#21FFCD is a cyan with RGB values 33, 255, 205 and HSL 166°, 100%, 56%. It is a light colour, so black text on it reaches 16.3:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.

Colour values

#21FFCD#21FFCD
HEX#21FFCD
RGBrgb(33, 255, 205)
RGB (0–1)0.1294, 1, 0.8039
RGB percentages12.9%, 100%, 80.4%
HSLhsl(166.5, 100%, 56.5%)
HSV / HSBhsv(166.5, 87.1%, 100%)
CMYK87.1%, 0%, 19.6%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,173
CSS custom property--colour: #21FFCD;

Brightness & contrast

Relative luminance0.76251WCAG 2.x, 0 is black and 1 is white
Perceived brightness208.1 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 16.25:1
Contrast with white1.29:1WCAG normal text: Fail
Contrast with black16.25:1WCAG normal text: AAA
Greyscale equivalent#CCCCCC
Inverted#DE0032

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#F7EDCBno red cones; affects about 1% of men; ΔE 58.8 from the original
Deuteranopia#DEDBD1no green cones; the most common form, about 1% of men; ΔE 59.8 from the original
Tritanopia#00FFF1no blue cones; rare, and affects men and women equally; ΔE 19.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.29:1WCAG large text: Fail
Contrast with black, large text16.25:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 14.9Turquoise · ΔE 23.2Medium spring green · ΔE 24.8Medium aquamarine · ΔE 26.2Aqua · ΔE 27.2Cyan · ΔE 27.2
Nearest named CSS colourAquamarine (#7FFFD4)ΔE 14.9, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF2153
Analogous#21FF5E, #21C2FF
Triadic#CD21FF, #FFCD21
Split complementary#FF21C2, #FF5E21
Tetradic#5E21FF, #FF2153, #C2FF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFFFB
Lighter +30%#BAFFEF
Lighter +20%#87FFE4
Lighter +10%#54FFD8
Darker −10%#00EDB8
Darker −20%#00BA90
Darker −30%#008769
Darker −40%#005441
More saturated +25%#21FFCD
Less saturated −25%#3DE3BE

Channel breakdown

R33
G255
B205
Red33 (12.9%)
Green255 (100%)
Blue205 (80.4%)
Hue166.49°
Saturation (HSL)100%
Lightness56.47%
Dominant channelGreen
Hex per channelR 21 · G FF · B CD

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