#21dff8

Color #21dff8

A vivid, highly saturated medium cyan.

Closest named color Dark Turquoise #00ced1 · ΔE 13.85 Nearest Tailwind class cyan-300 #53eafd · ΔE 3.2

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#21dff8

RGB

rgb(33, 223, 248)

HSL

hsl(187, 93.9%, 55.1%)

HSV / HSB

hsv(187, 86.7%, 97.3%)

CMYK

cmyk(86.7%, 10.1%, 0%, 2.7%)

LAB

lab(81.77, -34.77, -24.56)

LCH

lch(81.77, 42.57, 215.24)

OKLCH

oklch(82.9%, 0.139, 209.51)

HWB

hwb(187, 12.9%, 2.7%)

Harmony colors

Complementary

#f83a21

Analogous

#21f8a6

#21dff8

#2173f8

Triadic

#21dff8

#f821df

#dff821

Split-complementary

#21dff8

#f82173

#f8a621

Tetradic

#21dff8

#3a21f8

#f83a21

#dff821

Square

#21dff8

#a621f8

#f83a21

#73f821

Shades

Color #21dff8 mixed toward black.

#07c9e3

#06a1b6

#047988

#03515b

#01282d

Tints

Color #21dff8 mixed toward white.

#46e4f9

#6beafa

#90effc

#b5f4fd

#dafafe

Tones

Color #21dff8 mixed toward gray.

#33d1e6

#45c3d4

#57b6c2

#69a8b0

#7b9a9e

Accessibility

Aa White text on this color

1.62:1

Aa Black text on this color

12.98:1

Black text reads better on this background (12.98:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#9b9cf2 · ΔE 32.4

Deuteranopia

#9284f1 · ΔE 37.2

Tritanopia

#40eeed · ΔE 8.9

Achromatopsia

#cbcbcb · ΔE 23.5

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #21dff8;

Tailwind (arbitrary value)

bg-[#21dff8]

Related colors

Powder Blue #b0e0e6

Cadet Blue #5f9ea0

Dark Turquoise #00ced1

Aqua #00ffff

Azure #f0ffff

Dark Cyan #008b8b

Frequently asked questions

#21dff8 (#21dff8) is rgb(33, 223, 248) in RGB.

No, #21dff8 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #21dff8, or check how it holds up for accessibility.

Generate a palette → Check contrast