#3f4f5b

Color #3f4f5b

A muted dark blue.

Closest named color Charcoal #36454f · ΔE 4.47 Nearest Tailwind class gray-600 #4a5565 · ΔE 4.5

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Conversions

HEX

#3f4f5b

RGB

rgb(63, 79, 91)

HSL

hsl(205.7, 18.2%, 30.2%)

HSV / HSB

hsv(205.7, 30.8%, 35.7%)

CMYK

cmyk(30.8%, 13.2%, 0%, 64.3%)

LAB

lab(32.71, -3.06, -9.08)

LCH

lch(32.71, 9.58, 251.38)

OKLCH

oklch(41.9%, 0.0284, 240.73)

HWB

hwb(205.7, 24.7%, 64.3%)

Harmony colors

Complementary

#5b4b3f

Analogous

#3f5b59

#3f4f5b

#3f415b

Triadic

#3f4f5b

#5b3f4f

#4f5b3f

Split-complementary

#3f4f5b

#5b3f41

#5b593f

Tetradic

#3f4f5b

#4b3f5b

#5b4b3f

#4f5b3f

Square

#3f4f5b

#593f5b

#5b4b3f

#415b3f

Shades

Color #3f4f5b mixed toward black.

#34424c

#2a353d

#1f282e

#151a1e

#0a0d0f

Tints

Color #3f4f5b mixed toward white.

#576d7e

#738b9e

#96a8b6

#b9c5ce

#dce2e7

Tones

Color #3f4f5b mixed toward gray.

#414f59

#444e56

#464e54

#484e52

#4b4d4f

Accessibility

Aa White text on this color

8.46:1

Aa Black text on this color

2.48:1

White text reads better on this background (8.46:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#464758 · ΔE 9.1

Deuteranopia

#464458 · ΔE 11.6

Tritanopia

#405656 · ΔE 8.3

Achromatopsia

#4d4d4d · ΔE 8.3

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

Code

CSS

background-color: #3f4f5b;

Tailwind (arbitrary value)

bg-[#3f4f5b]

Related colors

Steel Blue #4682b4

Charcoal #36454f

Alice Blue #f0f8ff

Light Sky Blue #87cefa

Dodger Blue #1e90ff

Light Slate Gray #778899

Frequently asked questions

#3f4f5b (#3f4f5b) is rgb(63, 79, 91) in RGB.

No, #3f4f5b 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 #3f4f5b, or check how it holds up for accessibility.

Generate a palette → Check contrast