#3975cf

Color #3975cf

A moderately saturated medium blue.

Closest named color Cornflower Blue #6495ed · ΔE 12.78 Nearest Tailwind class blue-500 #2b7fff · ΔE 6.2

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Conversions

HEX

#3975cf

RGB

rgb(57, 117, 207)

HSL

hsl(216, 61%, 51.8%)

HSV / HSB

hsv(216, 72.5%, 81.2%)

CMYK

cmyk(72.5%, 43.5%, 0%, 18.8%)

LAB

lab(49.61, 11.11, -52.2)

LCH

lch(49.61, 53.37, 282.02)

OKLCH

oklch(56.9%, 0.1524, 258.49)

HWB

hwb(216, 22.4%, 18.8%)

Harmony colors

Complementary

#cf9339

Analogous

#39c0cf

#3975cf

#4839cf

Triadic

#3975cf

#cf3975

#75cf39

Split-complementary

#3975cf

#cf4839

#c0cf39

Tetradic

#3975cf

#9339cf

#cf9339

#75cf39

Square

#3975cf

#cf39c0

#cf9339

#39cf48

Shades

Color #3975cf mixed toward black.

#2b61b1

#224d8e

#1a3a6a

#112747

#091323

Tints

Color #3975cf mixed toward white.

#5a8cd7

#7ba3df

#9cbae7

#bdd1ef

#dee8f7

Tones

Color #3975cf mixed toward gray.

#4678c3

#527ab6

#5f7daa

#6b7f9d

#788291

Accessibility

Aa White text on this color

4.55:1

Aa Black text on this color

4.62:1

Black text reads better on this background (4.62:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#595abe · ΔE 12.4

Deuteranopia

#5651ba · ΔE 15

Tritanopia

#3eafac · ΔE 32.5

Achromatopsia

#767676 · ΔE 24.3

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

Code

CSS

background-color: #3975cf;

Tailwind (arbitrary value)

bg-[#3975cf]

Related colors

Light Steel Blue #b0c4de

Cornflower Blue #6495ed

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Frequently asked questions

#3975cf (#3975cf) is rgb(57, 117, 207) in RGB.

No, #3975cf 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 #3975cf, or check how it holds up for accessibility.

Generate a palette → Check contrast