#3f657a

Color #3f657a

A muted dark blue.

Closest named color Slate Gray #708090 · ΔE 14.12 Nearest Tailwind class cyan-800 #005f78 · ΔE 6.2

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Conversions

HEX

#3f657a

RGB

rgb(63, 101, 122)

HSL

hsl(201.4, 31.9%, 36.3%)

HSV / HSB

hsv(201.4, 48.4%, 47.8%)

CMYK

cmyk(48.4%, 17.2%, 0%, 52.2%)

LAB

lab(40.85, -7.3, -15.95)

LCH

lch(40.85, 17.54, 245.41)

OKLCH

oklch(48.7%, 0.0549, 233.67)

HWB

hwb(201.4, 24.7%, 52.2%)

Harmony colors

Complementary

#7a543f

Analogous

#3f7a72

#3f657a

#3f487a

Triadic

#3f657a

#7a3f65

#657a3f

Split-complementary

#3f657a

#7a3f48

#7a723f

Tetradic

#3f657a

#543f7a

#7a543f

#657a3f

Square

#3f657a

#723f7a

#7a543f

#487a3f

Shades

Color #3f657a mixed toward black.

#355466

#2a4351

#20333d

#152229

#0b1114

Tints

Color #3f657a mixed toward white.

#51839e

#709db5

#94b5c8

#b8ceda

#dbe6ed

Tones

Color #3f657a mixed toward gray.

#446475

#496270

#4e616b

#535f66

#585e61

Accessibility

Aa White text on this color

6.26:1

Aa Black text on this color

3.35:1

White text reads better on this background (6.26:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#525275 · ΔE 16.6

Deuteranopia

#504d74 · ΔE 17.8

Tritanopia

#427271 · ΔE 12.4

Achromatopsia

#606060 · ΔE 13.5

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

Code

CSS

background-color: #3f657a;

Tailwind (arbitrary value)

bg-[#3f657a]

Related colors

Light Sky Blue #87cefa

Charcoal #36454f

Sky Blue #87ceeb

Steel Blue #4682b4

Deep Sky Blue #00bfff

Alice Blue #f0f8ff

Frequently asked questions

#3f657a (#3f657a) is rgb(63, 101, 122) in RGB.

No, #3f657a 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 #3f657a, or check how it holds up for accessibility.

Generate a palette → Check contrast