#636a79

Color #636a79

A nearly neutral, gray-leaning medium blue.

Closest named color Slate Gray #708090 · ΔE 8.72 Nearest Tailwind class gray-500 #6a7282 · ΔE 3.1

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

Conversions

HEX

#636a79

RGB

rgb(99, 106, 121)

HSL

hsl(220.9, 10%, 43.1%)

HSV / HSB

hsv(220.9, 18.2%, 47.5%)

CMYK

cmyk(18.2%, 12.4%, 0%, 52.5%)

LAB

lab(44.72, 0.76, -9.25)

LCH

lch(44.72, 9.28, 274.7)

OKLCH

oklch(52.4%, 0.0252, 265.67)

HWB

hwb(220.9, 38.8%, 52.5%)

Harmony colors

Complementary

#797263

Analogous

#637579

#636a79

#676379

Triadic

#636a79

#79636a

#6a7963

Split-complementary

#636a79

#796763

#757963

Tetradic

#636a79

#726379

#797263

#6a7963

Square

#636a79

#796375

#797263

#637967

Shades

Color #636a79 mixed toward black.

#525865

#424751

#31353c

#212328

#101214

Tints

Color #636a79 mixed toward white.

#7a8292

#959ba8

#afb4be

#cacdd3

#e4e6e9

Tones

Color #636a79 mixed toward gray.

#656b77

#676b75

#686c73

#6a6d72

#6c6d70

Accessibility

Aa White text on this color

5.43:1

Aa Black text on this color

3.87:1

White text reads better on this background (5.43:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#666676 · ΔE 3.9

Deuteranopia

#666575 · ΔE 4.5

Tritanopia

#637372 · ΔE 10.9

Achromatopsia

#6a6a6a · ΔE 7.7

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

Code

CSS

background-color: #636a79;

Tailwind (arbitrary value)

bg-[#636a79]

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

#636a79 (#636a79) is rgb(99, 106, 121) in RGB.

No, #636a79 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 #636a79, or check how it holds up for accessibility.

Generate a palette → Check contrast