#3f477a

Color #3f477a

A muted dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 18.72 Nearest Tailwind class blue-900 #1c398e · ΔE 7.7

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

Conversions

HEX

#3f477a

RGB

rgb(63, 71, 122)

HSL

hsl(231.9, 31.9%, 36.3%)

HSV / HSB

hsv(231.9, 48.4%, 47.8%)

CMYK

cmyk(48.4%, 41.8%, 0%, 52.2%)

LAB

lab(31.73, 11.67, -30.13)

LCH

lch(31.73, 32.31, 291.17)

OKLCH

oklch(41.6%, 0.0855, 275.3)

HWB

hwb(231.9, 24.7%, 52.2%)

Harmony colors

Complementary

#7a723f

Analogous

#3f657a

#3f477a

#553f7a

Triadic

#3f477a

#7a3f47

#477a3f

Split-complementary

#3f477a

#7a553f

#657a3f

Tetradic

#3f477a

#723f7a

#7a723f

#477a3f

Square

#3f477a

#7a3f65

#7a723f

#3f7a55

Shades

Color #3f477a mixed toward black.

#353b66

#2a2f51

#20243d

#151829

#0b0c14

Tints

Color #3f477a mixed toward white.

#515c9e

#7079b5

#949bc8

#b8bcda

#dbdeed

Tones

Color #3f477a mixed toward gray.

#444b75

#494e70

#4e526b

#535566

#585961

Accessibility

Aa White text on this color

8.77:1

Aa Black text on this color

2.39:1

White text reads better on this background (8.77:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#434370 · ΔE 3.1

Deuteranopia

#42426e · ΔE 3.4

Tritanopia

#3f6866 · ΔE 25.4

Achromatopsia

#4b4b4b · ΔE 19.3

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

Code

CSS

background-color: #3f477a;

Tailwind (arbitrary value)

bg-[#3f477a]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#3f477a (#3f477a) is rgb(63, 71, 122) in RGB.

No, #3f477a 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 #3f477a, or check how it holds up for accessibility.

Generate a palette → Check contrast