#6440b1

Color #6440b1

A moderately saturated medium blue.

Closest named color Rebecca Purple #663399 · ΔE 8.84 Nearest Tailwind class indigo-700 #432dd7 · ΔE 7.6

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

Conversions

HEX

#6440b1

RGB

rgb(100, 64, 177)

HSL

hsl(259.1, 46.9%, 47.3%)

HSV / HSB

hsv(259.1, 63.8%, 69.4%)

CMYK

cmyk(43.5%, 63.8%, 0%, 30.6%)

LAB

lab(37.02, 41.79, -54.9)

LCH

lch(37.02, 69, 307.28)

OKLCH

oklch(47.5%, 0.1709, 293.48)

HWB

hwb(259.1, 25.1%, 30.6%)

Harmony colors

Complementary

#8db140

Analogous

#4055b1

#6440b1

#9d40b1

Triadic

#6440b1

#b16440

#40b164

Split-complementary

#6440b1

#b19d40

#55b140

Tetradic

#6440b1

#b1408d

#8db140

#40b164

Square

#6440b1

#b14055

#8db140

#40b19d

Shades

Color #6440b1 mixed toward black.

#533594

#432b76

#322059

#21153b

#110b1e

Tints

Color #6440b1 mixed toward white.

#7c5ac4

#967bcf

#b09cdb

#cbbde7

#e5def3

Tones

Color #6440b1 mixed toward gray.

#6749a8

#6b539e

#6e5c95

#72668b

#756f82

Accessibility

Aa White text on this color

7.22:1

Aa Black text on this color

2.91:1

White text reads better on this background (7.22:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#57569f · ΔE 8.5

Deuteranopia

#595b9a · ΔE 10.5

Tritanopia

#638e8a · ΔE 34.8

Achromatopsia

#575757 · ΔE 27.1

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

Code

CSS

background-color: #6440b1;

Tailwind (arbitrary value)

bg-[#6440b1]

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

#6440b1 (#6440b1) is rgb(100, 64, 177) in RGB.

No, #6440b1 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.

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 #6440b1, or check how it holds up for accessibility.

Generate a palette → Check contrast