#42b4d5

Color #42b4d5

A moderately saturated medium cyan.

Closest named color Sky Blue #87ceeb · ΔE 13.48 Nearest Tailwind class cyan-500 #00b8db · ΔE 2.3

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

Conversions

HEX

#42b4d5

RGB

rgb(66, 180, 213)

HSL

hsl(193.5, 63.6%, 54.7%)

HSV / HSB

hsv(193.5, 69%, 83.5%)

CMYK

cmyk(69%, 15.5%, 0%, 16.5%)

LAB

lab(68.46, -21.47, -25.98)

LCH

lch(68.46, 33.7, 230.43)

OKLCH

oklch(71.9%, 0.1109, 220.83)

HWB

hwb(193.5, 25.9%, 16.5%)

Harmony colors

Complementary

#d56342

Analogous

#42d5ad

#42b4d5

#426ad5

Triadic

#42b4d5

#d542b4

#b4d542

Split-complementary

#42b4d5

#d5426a

#d5ad42

Tetradic

#42b4d5

#6342d5

#d56342

#b4d542

Square

#42b4d5

#ad42d5

#d56342

#6ad542

Shades

Color #42b4d5 mixed toward black.

#2a9dbe

#227e98

#195e72

#113f4c

#081f26

Tints

Color #42b4d5 mixed toward white.

#62c0dc

#81cde3

#a1d9ea

#c0e6f1

#e0f2f8

Tones

Color #42b4d5 mixed toward gray.

#4eadc9

#5ba6bc

#67a0b0

#7399a4

#7f9298

Accessibility

Aa White text on this color

2.41:1

Aa Black text on this color

8.72:1

Black text reads better on this background (8.72:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#8384ce · ΔE 25.5

Deuteranopia

#7d74cc · ΔE 28.9

Tritanopia

#4dc8c6 · ΔE 13.4

Achromatopsia

#a7a7a7 · ΔE 20.9

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

Code

CSS

background-color: #42b4d5;

Tailwind (arbitrary value)

bg-[#42b4d5]

Related colors

Light Blue #add8e6

Deep Sky Blue #00bfff

Sky Blue #87ceeb

Powder Blue #b0e0e6

Light Sky Blue #87cefa

Charcoal #36454f

Frequently asked questions

#42b4d5 (#42b4d5) is rgb(66, 180, 213) in RGB.

No, #42b4d5 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.

Try it → Accessibility

Contrast Checker

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

Try it → Generators

Palette Generator

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

Try it →

Build something with this color

Generate a full palette from #42b4d5, or check how it holds up for accessibility.

Generate a palette → Check contrast