#3f3899

Color #3f3899

A moderately saturated medium blue.

Closest named color Dark Slate Blue #483d8b · ΔE 11.79 Nearest Tailwind class indigo-900 #312c85 · ΔE 4.4

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Conversions

HEX

#3f3899

RGB

rgb(63, 56, 153)

HSL

hsl(244.3, 46.4%, 41%)

HSV / HSB

hsv(244.3, 63.4%, 60%)

CMYK

cmyk(58.8%, 63.4%, 0%, 40%)

LAB

lab(29.87, 31.94, -52.25)

LCH

lch(29.87, 61.24, 301.44)

OKLCH

oklch(40.9%, 0.1527, 280.45)

HWB

hwb(244.3, 22%, 40%)

Harmony colors

Complementary

#929938

Analogous

#386299

#3f3899

#703899

Triadic

#3f3899

#993f38

#38993f

Split-complementary

#3f3899

#997038

#629938

Tetradic

#3f3899

#993892

#929938

#38993f

Square

#3f3899

#993862

#929938

#389970

Shades

Color #3f3899 mixed toward black.

#342f80

#2a2566

#1f1c4d

#151333

#0a091a

Tints

Color #3f3899 mixed toward white.

#5047bc

#736cc9

#9691d7

#b9b6e4

#dcdaf2

Tones

Color #3f3899 mixed toward gray.

#464091

#4d4889

#545081

#5b5879

#626071

Accessibility

Aa White text on this color

9.39:1

Aa Black text on this color

2.24:1

White text reads better on this background (9.39:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3c3c89 · ΔE 3.4

Deuteranopia

#3c3d85 · ΔE 4.2

Tritanopia

#3f7b77 · ΔE 34.3

Achromatopsia

#464646 · ΔE 25.9

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

Code

CSS

background-color: #3f3899;

Tailwind (arbitrary value)

bg-[#3f3899]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#3f3899 (#3f3899) is rgb(63, 56, 153) in RGB.

No, #3f3899 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.

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Contrast Checker

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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 #3f3899, or check how it holds up for accessibility.

Generate a palette → Check contrast