#646871

Color #646871

A nearly neutral, gray-leaning medium blue.

Closest named color Dim Gray #696969 · ΔE 5.61 Nearest Tailwind class zinc-500 #71717b · ΔE 4.5

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Conversions

HEX

#646871

RGB

rgb(100, 104, 113)

HSL

hsl(221.5, 6.1%, 41.8%)

HSV / HSB

hsv(221.5, 11.5%, 44.3%)

CMYK

cmyk(11.5%, 8%, 0%, 55.7%)

LAB

lab(43.95, 0.44, -5.57)

LCH

lch(43.95, 5.59, 274.52)

OKLCH

oklch(51.7%, 0.015, 266.57)

HWB

hwb(221.5, 39.2%, 55.7%)

Harmony colors

Complementary

#716d64

Analogous

#646f71

#646871

#676471

Triadic

#646871

#716468

#687164

Split-complementary

#646871

#716764

#6f7164

Tetradic

#646871

#6d6471

#716d64

#687164

Square

#646871

#71646f

#716d64

#647167

Shades

Color #646871 mixed toward black.

#53575e

#43454b

#323439

#212326

#111113

Tints

Color #646871 mixed toward white.

#7c808b

#969aa2

#b0b3b9

#cbccd1

#e5e6e8

Tones

Color #646871 mixed toward gray.

#656970

#66696f

#67696e

#686a6d

#6a6a6c

Accessibility

Aa White text on this color

5.58:1

Aa Black text on this color

3.76:1

White text reads better on this background (5.58:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#66666f · ΔE 2.3

Deuteranopia

#66656e · ΔE 2.9

Tritanopia

#646d6d · ΔE 6.6

Achromatopsia

#686868 · ΔE 5

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

Code

CSS

background-color: #646871;

Tailwind (arbitrary value)

bg-[#646871]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#646871 (#646871) is rgb(100, 104, 113) in RGB.

No, #646871 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 #646871, or check how it holds up for accessibility.

Generate a palette → Check contrast