#646b77

Color #646b77

A nearly neutral, gray-leaning medium blue.

Closest named color Dim Gray #696969 · ΔE 7.6 Nearest Tailwind class gray-500 #6a7282 · ΔE 3.3

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Conversions

HEX

#646b77

RGB

rgb(100, 107, 119)

HSL

hsl(217.9, 8.7%, 42.9%)

HSV / HSB

hsv(217.9, 16%, 46.7%)

CMYK

cmyk(16%, 10.1%, 0%, 53.3%)

LAB

lab(45.02, 0.04, -7.58)

LCH

lch(45.02, 7.58, 270.3)

OKLCH

oklch(52.6%, 0.0207, 261.4)

HWB

hwb(217.9, 39.2%, 53.3%)

Harmony colors

Complementary

#777064

Analogous

#647477

#646b77

#666477

Triadic

#646b77

#77646b

#6b7764

Split-complementary

#646b77

#776664

#747764

Tetradic

#646b77

#706477

#777064

#6b7764

Square

#646b77

#776474

#777064

#647766

Shades

Color #646b77 mixed toward black.

#535963

#43474f

#32353b

#212428

#111214

Tints

Color #646b77 mixed toward white.

#7b8390

#959ca6

#b0b5bd

#cacdd3

#e5e6e9

Tones

Color #646b77 mixed toward gray.

#656b75

#676c74

#696c72

#6a6d71

#6c6d6f

Accessibility

Aa White text on this color

5.37:1

Aa Black text on this color

3.91:1

White text reads better on this background (5.37:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#676774 · ΔE 4.1

Deuteranopia

#676674 · ΔE 4.9

Tritanopia

#647271 · ΔE 8.9

Achromatopsia

#6a6a6a · ΔE 6.5

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

Code

CSS

background-color: #646b77;

Tailwind (arbitrary value)

bg-[#646b77]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#646b77 (#646b77) is rgb(100, 107, 119) in RGB.

No, #646b77 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 #646b77, or check how it holds up for accessibility.

Generate a palette → Check contrast