Colour

#21FFDB

#21FFDB
Cyan
Light
Nearest: Aquamarine

#21FFDB is a cyan with RGB values 33, 255, 219 and HSL 170°, 100%, 56%. It is a light colour, so black text on it reaches 16.4:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.

Colour values

#21FFDB#21FFDB

HEX#21FFDB

RGBrgb(33, 255, 219)

RGB (0–1)0.1294, 1, 0.8588

RGB percentages12.9%, 100%, 85.9%

HSLhsl(170.3, 100%, 56.5%)

HSV / HSBhsv(170.3, 87.1%, 100%)

CMYK87.1%, 0%, 14.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,228,187

CSS custom property--colour: #21FFDB;

Brightness & contrast

Relative luminance0.76958WCAG 2.x, 0 is black and 1 is white

Perceived brightness209.7 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 16.39:1

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

Contrast with black16.39:1WCAG normal text: AAA

Greyscale equivalent#CDCDCD

Inverted#DE0024

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#F5EED9no red cones; affects about 1% of men; ΔE 56.3 from the original

Deuteranopia#DBDBDEno green cones; the most common form, about 1% of men; ΔE 57.6 from the original

Tritanopia#00FFF4no blue cones; rare, and affects men and women equally; ΔE 13.5 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 text16.39:1WCAG large text: AAA

Named colours

Aquamarine · ΔE 13.1 Turquoise · ΔE 17.3 Aqua · ΔE 19.6 Cyan · ΔE 19.6 Medium aquamarine · ΔE 24.1 Medium turquoise · ΔE 26.4

Nearest named CSS colourAquamarine (#7FFFD4)ΔE 13.07, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#FF2145

Analogous#21FF6C, #21B4FF

Triadic#DB21FF, #FFDB21

Split complementary#FF21B4, #FF6C21

Tetradic#6C21FF, #FF2145, #B4FF21

Tints, shades & saturation

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

Lighter +40%#EDFFFC

Lighter +30%#BAFFF4

Lighter +20%#87FFEC

Lighter +10%#54FFE3

Darker −10%#00EDC7

Darker −20%#00BA9C

Darker −30%#008771

Darker −40%#005446

More saturated +25%#21FFDB

Less saturated −25%#3DE3C8

Channel breakdown

R33

G255

B219

Red33 (12.9%)

Green255 (100%)

Blue219 (85.9%)

Hue170.27°

Saturation (HSL)100%

Lightness56.47%

Dominant channelGreen

Hex per channelR 21 · G FF · B DB

Keep nerding

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#21FFDB

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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