#3f3f42

Color #3f3f42

A nearly neutral, gray-leaning dark blue.

Closest named color Charcoal #36454f · ΔE 7.47 Nearest Tailwind class neutral-700 #404040 · ΔE 2

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Conversions

HEX

#3f3f42

RGB

rgb(63, 63, 66)

HSL

hsl(240, 2.3%, 25.3%)

HSV / HSB

hsv(240, 4.5%, 25.9%)

CMYK

cmyk(4.5%, 4.5%, 0%, 74.1%)

LAB

lab(26.75, 0.69, -1.83)

LCH

lch(26.75, 1.96, 290.66)

OKLCH

oklch(36.9%, 0.0051, 285.95)

HWB

hwb(240, 24.7%, 74.1%)

Harmony colors

Complementary

#42423f

Analogous

#3f4142

#3f3f42

#413f42

Triadic

#3f3f42

#423f3f

#3f423f

Split-complementary

#3f3f42

#42413f

#41423f

Tetradic

#3f3f42

#423f42

#42423f

#3f423f

Square

#3f3f42

#423f41

#42423f

#3f4241

Shades

Color #3f3f42 mixed toward black.

#353537

#2a2a2c

#202021

#151516

#0b0b0b

Tints

Color #3f3f42 mixed toward white.

#5e5e62

#7d7d83

#9e9ea2

#bebec1

#dfdfe0

Tones

Color #3f3f42 mixed toward gray.

#3f3f42

#404042

#404041

Accessibility

Aa White text on this color

10.49:1

Aa Black text on this color

2:1

White text reads better on this background (10.49:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3f3f41 · ΔE 0.7

Deuteranopia

#3f3f41 · ΔE 0.7

Tritanopia

#3f4141 · ΔE 2.7

Achromatopsia

#3f3f3f · ΔE 2

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

Code

CSS

background-color: #3f3f42;

Tailwind (arbitrary value)

bg-[#3f3f42]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#3f3f42 (#3f3f42) is rgb(63, 63, 66) in RGB.

No, #3f3f42 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #3f3f42, or check how it holds up for accessibility.

Generate a palette → Check contrast