#643cbb

Color #643cbb

A moderately saturated medium blue.

Closest named color Slate Blue #6a5acd · ΔE 13.95 Nearest Tailwind class indigo-700 #432dd7 · ΔE 6.1

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Conversions

HEX

#643cbb

RGB

rgb(100, 60, 187)

HSL

hsl(258.9, 51.4%, 48.4%)

HSV / HSB

hsv(258.9, 67.9%, 73.3%)

CMYK

cmyk(46.5%, 67.9%, 0%, 26.7%)

LAB

lab(36.98, 46.77, -60.88)

LCH

lch(36.98, 76.77, 307.53)

OKLCH

oklch(47.7%, 0.1882, 292.19)

HWB

hwb(258.9, 23.5%, 26.7%)

Harmony colors

Complementary

#93bb3c

Analogous

#3c53bb

#643cbb

#a33cbb

Triadic

#643cbb

#bb643c

#3cbb64

Split-complementary

#643cbb

#bba33c

#53bb3c

Tetradic

#643cbb

#bb3c93

#93bb3c

#3cbb64

Square

#643cbb

#bb3c53

#93bb3c

#3cbba3

Shades

Color #643cbb mixed toward black.

#53329c

#43287d

#321e5d

#21143e

#110a1f

Tints

Color #643cbb mixed toward white.

#7c59ca

#977ad4

#b19bdf

#cbbdea

#e5def4

Tones

Color #643cbb mixed toward gray.

#6847b0

#6c51a6

#705c9b

#746691

#787186

Accessibility

Aa White text on this color

7.23:1

Aa Black text on this color

2.91:1

White text reads better on this background (7.23:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#5555a7 · ΔE 9

Deuteranopia

#585aa2 · ΔE 10.7

Tritanopia

#629591 · ΔE 37.4

Achromatopsia

#575757 · ΔE 28.2

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

Code

CSS

background-color: #643cbb;

Tailwind (arbitrary value)

bg-[#643cbb]

Related colors

Medium Purple #9370db

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Rebecca Purple #663399

Blue Violet #8a2be2

Frequently asked questions

#643cbb (#643cbb) is rgb(100, 60, 187) in RGB.

No, #643cbb 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 #643cbb, or check how it holds up for accessibility.

Generate a palette → Check contrast