#3f637e

Color #3f637e

A muted dark blue.

Closest named color Slate Gray #708090 · ΔE 15.32 Nearest Tailwind class sky-800 #00598a · ΔE 6.6

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

Conversions

HEX

#3f637e

RGB

rgb(63, 99, 126)

HSL

hsl(205.7, 33.3%, 37.1%)

HSV / HSB

hsv(205.7, 50%, 49.4%)

CMYK

cmyk(50%, 21.4%, 0%, 50.6%)

LAB

lab(40.39, -4.85, -19.08)

LCH

lch(40.39, 19.69, 255.74)

OKLCH

oklch(48.4%, 0.0602, 241.94)

HWB

hwb(205.7, 24.7%, 50.6%)

Harmony colors

Complementary

#7e5a3f

Analogous

#3f7e7a

#3f637e

#3f447e

Triadic

#3f637e

#7e3f63

#637e3f

Split-complementary

#3f637e

#7e3f44

#7e7a3f

Tetradic

#3f637e

#5a3f7e

#7e5a3f

#637e3f

Square

#3f637e

#7a3f7e

#7e5a3f

#447e3f

Shades

Color #3f637e mixed toward black.

#355369

#2a4254

#20323f

#15212a

#0b1115

Tints

Color #3f637e mixed toward white.

#517fa2

#7099b8

#94b3ca

#b8ccdb

#dbe6ed

Tones

Color #3f637e mixed toward gray.

#446279

#4a6274

#4f616e

#546069

#595f64

Accessibility

Aa White text on this color

6.37:1

Aa Black text on this color

3.3:1

White text reads better on this background (6.37:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#515178 · ΔE 14.2

Deuteranopia

#4f4c77 · ΔE 15.2

Tritanopia

#417372 · ΔE 15.3

Achromatopsia

#5f5f5f · ΔE 14

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

Code

CSS

background-color: #3f637e;

Tailwind (arbitrary value)

bg-[#3f637e]

Related colors

Steel Blue #4682b4

Charcoal #36454f

Alice Blue #f0f8ff

Light Sky Blue #87cefa

Dodger Blue #1e90ff

Light Slate Gray #778899

Frequently asked questions

#3f637e (#3f637e) is rgb(63, 99, 126) in RGB.

No, #3f637e 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 #3f637e, or check how it holds up for accessibility.

Generate a palette → Check contrast