#21b5d2

Color #21b5d2

A vivid, highly saturated medium cyan.

Closest named color Sky Blue #87ceeb · ΔE 16.56 Nearest Tailwind class cyan-500 #00b8db · ΔE 1.8

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Conversions

HEX

#21b5d2

RGB

rgb(33, 181, 210)

HSL

hsl(189.8, 72.8%, 47.6%)

HSV / HSB

hsv(189.8, 84.3%, 82.4%)

CMYK

cmyk(84.3%, 13.8%, 0%, 17.6%)

LAB

lab(68.04, -26.47, -25.04)

LCH

lch(68.04, 36.44, 223.41)

OKLCH

oklch(71.4%, 0.1207, 215.45)

HWB

hwb(189.8, 12.9%, 17.6%)

Harmony colors

Complementary

#d23e21

Analogous

#21d296

#21b5d2

#215dd2

Triadic

#21b5d2

#d221b5

#b5d221

Split-complementary

#21b5d2

#d2215d

#d29621

Tetradic

#21b5d2

#3e21d2

#d23e21

#b5d221

Square

#21b5d2

#9621d2

#d23e21

#5dd221

Shades

Color #21b5d2 mixed toward black.

#1c97af

#16798c

#115a69

#0b3c46

#061e23

Tints

Color #21b5d2 mixed toward white.

#3fc6e1

#65d2e7

#8cdded

#b2e8f3

#d9f4f9

Tones

Color #21b5d2 mixed toward gray.

#30abc3

#3ea1b4

#4d97a6

#5c8d97

#6b8388

Accessibility

Aa White text on this color

2.44:1

Aa Black text on this color

8.6:1

Black text reads better on this background (8.6:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#7e7fcb · ΔE 28.7

Deuteranopia

#766cca · ΔE 32.8

Tritanopia

#37c6c5 · ΔE 11.3

Achromatopsia

#a6a6a6 · ΔE 22

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

Code

CSS

background-color: #21b5d2;

Tailwind (arbitrary value)

bg-[#21b5d2]

Related colors

Powder Blue #b0e0e6

Light Blue #add8e6

Deep Sky Blue #00bfff

Sky Blue #87ceeb

Cadet Blue #5f9ea0

Dark Turquoise #00ced1

Frequently asked questions

#21b5d2 (#21b5d2) is rgb(33, 181, 210) in RGB.

No, #21b5d2 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #21b5d2, or check how it holds up for accessibility.

Generate a palette → Check contrast