#3f81ff

Color #3f81ff

A vivid, highly saturated light blue.

Closest named color Royal Blue #4169e1 · ΔE 9.94 Nearest Tailwind class blue-500 #2b7fff · ΔE 1.5

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

Conversions

HEX

#3f81ff

RGB

rgb(63, 129, 255)

HSL

hsl(219.4, 100%, 62.4%)

HSV / HSB

hsv(219.4, 75.3%, 100%)

CMYK

cmyk(75.3%, 49.4%, 0%, 0%)

LAB

lab(56.06, 21.86, -68.69)

LCH

lch(56.06, 72.08, 287.65)

OKLCH

oklch(62.9%, 0.1997, 261.74)

HWB

hwb(219.4, 24.7%, 0%)

Harmony colors

Complementary

#ffbd3f

Analogous

#3fe1ff

#3f81ff

#5d3fff

Triadic

#3f81ff

#ff3f81

#81ff3f

Split-complementary

#3f81ff

#ff5d3f

#e1ff3f

Tetradic

#3f81ff

#bd3fff

#ffbd3f

#81ff3f

Square

#3f81ff

#ff3fe1

#ffbd3f

#3fff5d

Shades

Color #3f81ff mixed toward black.

#0a5eff

#0049d4

#00379f

#00246a

#001235

Tints

Color #3f81ff mixed toward white.

#5f96ff

#7fabff

#9fc0ff

#bfd5ff

#dfeaff

Tones

Color #3f81ff mixed toward gray.

#4f86ef

#5f8bdf

#6f90cf

#7f95bf

#8f9aaf

Accessibility

Aa White text on this color

3.62:1

Aa Black text on this color

5.8:1

Black text reads better on this background (5.8:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6263e9 · ΔE 12.1

Deuteranopia

#5f59e3 · ΔE 15.1

Tritanopia

#44d5d0 · ΔE 38.5

Achromatopsia

#868686 · ΔE 27.5

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

Code

CSS

background-color: #3f81ff;

Tailwind (arbitrary value)

bg-[#3f81ff]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#3f81ff (#3f81ff) is rgb(63, 129, 255) in RGB.

No, #3f81ff 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.

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 #3f81ff, or check how it holds up for accessibility.

Generate a palette → Check contrast