#645c81

Color #645c81

A muted medium blue.

Closest named color Slate Gray #708090 · ΔE 20.18 Nearest Tailwind class mauve-500 #79697b · ΔE 9.1

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Conversions

HEX

#645c81

RGB

rgb(100, 92, 129)

HSL

hsl(253, 16.7%, 43.3%)

HSV / HSB

hsv(253, 28.7%, 50.6%)

CMYK

cmyk(22.5%, 28.7%, 0%, 49.4%)

LAB

lab(41.13, 11.64, -19.53)

LCH

lch(41.13, 22.74, 300.8)

OKLCH

oklch(49.7%, 0.0589, 294.04)

HWB

hwb(253, 36.1%, 49.4%)

Harmony colors

Complementary

#79815c

Analogous

#5c6681

#645c81

#765c81

Triadic

#645c81

#81645c

#5c8164

Split-complementary

#645c81

#81765c

#66815c

Tetradic

#645c81

#815c79

#79815c

#5c8164

Square

#645c81

#815c66

#79815c

#5c8176

Shades

Color #645c81 mixed toward black.

#534d6b

#433d56

#322e40

#211f2b

#110f15

Tints

Color #645c81 mixed toward white.

#7b729b

#958faf

#b0abc3

#cac7d7

#e5e3eb

Tones

Color #645c81 mixed toward gray.

#665f7e

#67627b

#696578

#6b6875

#6d6b71

Accessibility

Aa White text on this color

6.2:1

Aa Black text on this color

3.39:1

White text reads better on this background (6.2:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#616179 · ΔE 5.6

Deuteranopia

#616277 · ΔE 6.9

Tritanopia

#647371 · ΔE 21.7

Achromatopsia

#616161 · ΔE 16.4

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

Code

CSS

background-color: #645c81;

Tailwind (arbitrary value)

bg-[#645c81]

Related colors

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Medium Purple #9370db

Navy #000080

Lavender #e6e6fa

Frequently asked questions

#645c81 (#645c81) is rgb(100, 92, 129) in RGB.

No, #645c81 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 #645c81, or check how it holds up for accessibility.

Generate a palette → Check contrast