#3f3879

Color #3f3879

A muted dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 8.2 Nearest Tailwind class indigo-900 #312c85 · ΔE 5.3

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

Conversions

HEX

#3f3879

RGB

rgb(63, 56, 121)

HSL

hsl(246.5, 36.7%, 34.7%)

HSV / HSB

hsv(246.5, 53.7%, 47.5%)

CMYK

cmyk(47.9%, 53.7%, 0%, 52.5%)

LAB

lab(27.48, 21.32, -36.28)

LCH

lch(27.48, 42.08, 300.44)

OKLCH

oklch(38.3%, 0.1069, 285.08)

HWB

hwb(246.5, 22%, 52.5%)

Harmony colors

Complementary

#727938

Analogous

#385179

#3f3879

#603879

Triadic

#3f3879

#793f38

#38793f

Split-complementary

#3f3879

#796038

#517938

Tetradic

#3f3879

#793872

#727938

#38793f

Square

#3f3879

#793851

#727938

#387960

Shades

Color #3f3879 mixed toward black.

#352f65

#2a2551

#201c3c

#151328

#0b0914

Tints

Color #3f3879 mixed toward white.

#534a9f

#7067b9

#948dca

#b8b3dc

#dbd9ed

Tones

Color #3f3879 mixed toward gray.

#433d74

#48436e

#4c4869

#504e63

#54535e

Accessibility

Aa White text on this color

10.23:1

Aa Black text on this color

2.05:1

White text reads better on this background (10.23:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3c3c6e · ΔE 3.4

Deuteranopia

#3c3d6b · ΔE 4.4

Tritanopia

#3f6361 · ΔE 27.2

Achromatopsia

#414141 · ΔE 22.4

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

Code

CSS

background-color: #3f3879;

Tailwind (arbitrary value)

bg-[#3f3879]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#3f3879 (#3f3879) is rgb(63, 56, 121) in RGB.

No, #3f3879 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.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #3f3879, or check how it holds up for accessibility.

Generate a palette → Check contrast