Colour

#21FFE1

#21FFE1
Cyan
Light
Nearest: Aquamarine

#21FFE1 is a cyan with RGB values 33, 255, 225 and HSL 172°, 100%, 56%. It is a light colour, so black text on it reaches 16.5:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.

Colour values

#21FFE1#21FFE1

HEX#21FFE1

RGBrgb(33, 255, 225)

RGB (0–1)0.1294, 1, 0.8824

RGB percentages12.9%, 100%, 88.2%

HSLhsl(171.9, 100%, 56.5%)

HSV / HSBhsv(171.9, 87.1%, 100%)

CMYK87.1%, 0%, 11.8%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,228,193

CSS custom property--colour: #21FFE1;

Brightness & contrast

Relative luminance0.7728WCAG 2.x, 0 is black and 1 is white

Perceived brightness210.4 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 16.46:1

Contrast with white1.28:1WCAG normal text: Fail

Contrast with black16.46:1WCAG normal text: AAA

Greyscale equivalent#CECECE

Inverted#DE001E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#F4EFE0no red cones; affects about 1% of men; ΔE 55.1 from the original

Deuteranopia#D9DCE4no green cones; the most common form, about 1% of men; ΔE 56 from the original

Tritanopia#00FFF6no blue cones; rare, and affects men and women equally; ΔE 11.3 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text1.28:1WCAG large text: Fail

Contrast with black, large text16.46:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 13.5 Turquoise · ΔE 15.2 Aqua · ΔE 16.3 Cyan · ΔE 16.3 Medium aquamarine · ΔE 23.8 Medium turquoise · ΔE 24.1

Nearest named CSS colourAquamarine (#7FFFD4)ΔE 13.54, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#FF213F

Analogous#21FF72, #21AEFF

Triadic#E121FF, #FFE121

Split complementary#FF21AE, #FF7221

Tetradic#7221FF, #FF213F, #AEFF21

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#EDFFFD

Lighter +30%#BAFFF6

Lighter +20%#87FFEF

Lighter +10%#54FFE8

Darker −10%#00EDCD

Darker −20%#00BAA1

Darker −30%#008775

Darker −40%#005449

More saturated +25%#21FFE1

Less saturated −25%#3DE3CD

Channel breakdown

R33

G255

B225

Red33 (12.9%)

Green255 (100%)

Blue225 (88.2%)

Hue171.89°

Saturation (HSL)100%

Lightness56.47%

Dominant channelGreen

Hex per channelR 21 · G FF · B E1

Keep nerding

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#21FFE1

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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