#3f587e

Color #3f587e

A muted dark blue.

Closest named color Steel Blue #4682b4 · ΔE 18.37 Nearest Tailwind class slate-600 #45556c · ΔE 4.7

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Conversions

HEX

#3f587e

RGB

rgb(63, 88, 126)

HSL

hsl(216.2, 33.3%, 37.1%)

HSV / HSB

hsv(216.2, 50%, 49.4%)

CMYK

cmyk(50%, 30.2%, 0%, 50.6%)

LAB

lab(37.01, 1.96, -24.32)

LCH

lch(37.01, 24.4, 274.61)

OKLCH

oklch(45.7%, 0.0695, 258.54)

HWB

hwb(216.2, 24.7%, 50.6%)

Harmony colors

Complementary

#7e653f

Analogous

#3f787e

#3f587e

#463f7e

Triadic

#3f587e

#7e3f58

#587e3f

Split-complementary

#3f587e

#7e463f

#787e3f

Tetradic

#3f587e

#653f7e

#7e653f

#587e3f

Square

#3f587e

#7e3f78

#7e653f

#3f7e46

Shades

Color #3f587e mixed toward black.

#354969

#2a3b54

#202c3f

#151d2a

#0b0f15

Tints

Color #3f587e mixed toward white.

#5171a2

#708db8

#94a9ca

#b8c6db

#dbe2ed

Tones

Color #3f587e mixed toward gray.

#445979

#4a5a74

#4f5b6e

#545c69

#595e64

Accessibility

Aa White text on this color

7.22:1

Aa Black text on this color

2.91:1

White text reads better on this background (7.22:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#4b4b76 · ΔE 8.4

Deuteranopia

#4a4874 · ΔE 9.3

Tritanopia

#41706e · ΔE 21

Achromatopsia

#575757 · ΔE 15.8

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

Code

CSS

background-color: #3f587e;

Tailwind (arbitrary value)

bg-[#3f587e]

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

#3f587e (#3f587e) is rgb(63, 88, 126) in RGB.

No, #3f587e is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

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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 #3f587e, or check how it holds up for accessibility.

Generate a palette → Check contrast