#3978bf

Color #3978bf

A moderately saturated medium blue.

Closest named color Steel Blue #4682b4 · ΔE 13.57 Nearest Tailwind class sky-600 #0084d1 · ΔE 6

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Conversions

HEX

#3978bf

RGB

rgb(57, 120, 191)

HSL

hsl(211.8, 54%, 48.6%)

HSV / HSB

hsv(211.8, 70.2%, 74.9%)

CMYK

cmyk(70.2%, 37.2%, 0%, 25.1%)

LAB

lab(49.57, 3.45, -43.1)

LCH

lch(49.57, 43.24, 274.58)

OKLCH

oklch(56.6%, 0.128, 253.34)

HWB

hwb(211.8, 22.4%, 25.1%)

Harmony colors

Complementary

#bf8039

Analogous

#39bbbf

#3978bf

#3d39bf

Triadic

#3978bf

#bf3978

#78bf39

Split-complementary

#3978bf

#bf3d39

#bbbf39

Tetradic

#3978bf

#8039bf

#bf8039

#78bf39

Square

#3978bf

#bf39bb

#bf8039

#39bf3d

Shades

Color #3978bf mixed toward black.

#30649f

#26507f

#1d3c5f

#132840

#0a1420

Tints

Color #3978bf mixed toward white.

#578ecd

#78a5d7

#9abbe1

#bcd2eb

#dde8f5

Tones

Color #3978bf mixed toward gray.

#4479b4

#4f79a9

#5a7a9d

#667b92

#717b87

Accessibility

Aa White text on this color

4.55:1

Aa Black text on this color

4.61:1

Black text reads better on this background (4.61:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#5b5cb1 · ΔE 14

Deuteranopia

#5752ae · ΔE 16.6

Tritanopia

#3ea5a2 · ΔE 28.1

Achromatopsia

#767676 · ΔE 21.9

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

Code

CSS

background-color: #3978bf;

Tailwind (arbitrary value)

bg-[#3978bf]

Related colors

Light Slate Gray #778899

Slate Gray #708090

Light Steel Blue #b0c4de

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Steel Blue #4682b4

Frequently asked questions

#3978bf (#3978bf) is rgb(57, 120, 191) in RGB.

No, #3978bf 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 #3978bf, or check how it holds up for accessibility.

Generate a palette → Check contrast