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Colour

#21FFCF

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

#21FFCF is a cyan with RGB values 33, 255, 207 and HSL 167°, 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

#21FFCF#21FFCF
HEX#21FFCF
RGBrgb(33, 255, 207)
RGB (0–1)0.1294, 1, 0.8118
RGB percentages12.9%, 100%, 81.2%
HSLhsl(167, 100%, 56.5%)
HSV / HSBhsv(167, 87.1%, 100%)
CMYK87.1%, 0%, 18.8%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,175
CSS custom property--colour: #21FFCF;

Brightness & contrast

Relative luminance0.76348WCAG 2.x, 0 is black and 1 is white
Perceived brightness208.3 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 16.27:1
Contrast with white1.29:1WCAG normal text: Fail
Contrast with black16.27:1WCAG normal text: AAA
Greyscale equivalent#CCCCCC
Inverted#DE0030

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#F7EDCDno red cones; affects about 1% of men; ΔE 58.6 from the original
Deuteranopia#DDDBD2no green cones; the most common form, about 1% of men; ΔE 59.1 from the original
Tritanopia#00FFF1no blue cones; rare, and affects men and women equally; ΔE 18.4 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 text16.27:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 14.4Turquoise · ΔE 22.3Medium aquamarine · ΔE 25.8Medium spring green · ΔE 25.9Aqua · ΔE 26.1Cyan · ΔE 26.1
Nearest named CSS colourAquamarine (#7FFFD4)ΔE 14.42, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF2151
Analogous#21FF60, #21C0FF
Triadic#CF21FF, #FFCF21
Split complementary#FF21C0, #FF6021
Tetradic#6021FF, #FF2151, #C0FF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFFFB
Lighter +30%#BAFFF0
Lighter +20%#87FFE5
Lighter +10%#54FFDA
Darker −10%#00EDBA
Darker −20%#00BA92
Darker −30%#00876A
Darker −40%#005442
More saturated +25%#21FFCF
Less saturated −25%#3DE3BF

Channel breakdown

R33
G255
B207
Red33 (12.9%)
Green255 (100%)
Blue207 (81.2%)
Hue167.03°
Saturation (HSL)100%
Lightness56.47%
Dominant channelGreen
Hex per channelR 21 · G FF · B CF

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