#21cdff

Color #21cdff

A vivid, highly saturated medium cyan.

Closest named color Deep Sky Blue #00bfff · ΔE 9.96 Nearest Tailwind class sky-300 #74d4ff · ΔE 4.7

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

Conversions

HEX

#21cdff

RGB

rgb(33, 205, 255)

HSL

hsl(193.5, 100%, 56.5%)

HSV / HSB

hsv(193.5, 87.1%, 100%)

CMYK

cmyk(87.1%, 19.6%, 0%, 0%)

LAB

lab(76.8, -23.75, -35.91)

LCH

lch(76.8, 43.05, 236.52)

OKLCH

oklch(79%, 0.144, 224.49)

HWB

hwb(193.5, 12.9%, 0%)

Harmony colors

Complementary

#ff5321

Analogous

#21ffc2

#21cdff

#215eff

Triadic

#21cdff

#ff21cd

#cdff21

Split-complementary

#21cdff

#ff215e

#ffc221

Tetradic

#21cdff

#5321ff

#ff5321

#cdff21

Square

#21cdff

#c221ff

#ff5321

#5eff21

Shades

Color #21cdff mixed toward black.

#00baf0

#0095c0

#007090

#004a60

#002530

Tints

Color #21cdff mixed toward white.

#46d5ff

#6bdeff

#90e6ff

#b5eeff

#daf7ff

Tones

Color #21cdff mixed toward gray.

#34c3ed

#46b9da

#59afc8

#6ba4b5

#7e9aa3

Accessibility

Aa White text on this color

1.87:1

Aa Black text on this color

11.24:1

Black text reads better on this background (11.24:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#8f90f4 · ΔE 28.5

Deuteranopia

#867af1 · ΔE 32.9

Tritanopia

#3cebe9 · ΔE 17.4

Achromatopsia

#bebebe · ΔE 22.7

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

Code

CSS

background-color: #21cdff;

Tailwind (arbitrary value)

bg-[#21cdff]

Related colors

Light Blue #add8e6

Deep Sky Blue #00bfff

Sky Blue #87ceeb

Powder Blue #b0e0e6

Light Sky Blue #87cefa

Charcoal #36454f

Frequently asked questions

#21cdff (#21cdff) is rgb(33, 205, 255) in RGB.

No, #21cdff 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 #21cdff, or check how it holds up for accessibility.

Generate a palette → Check contrast