#3f4151

Color #3f4151

A nearly neutral, gray-leaning dark blue.

Closest named color Charcoal #36454f · ΔE 6.71 Nearest Tailwind class gray-700 #364153 · ΔE 4.2

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

Conversions

HEX

#3f4151

RGB

rgb(63, 65, 81)

HSL

hsl(233.3, 12.5%, 28.2%)

HSV / HSB

hsv(233.3, 22.2%, 31.8%)

CMYK

cmyk(22.2%, 19.8%, 0%, 68.2%)

LAB

lab(27.93, 3.16, -9.89)

LCH

lch(27.93, 10.38, 287.72)

OKLCH

oklch(38%, 0.0274, 279.46)

HWB

hwb(233.3, 24.7%, 68.2%)

Harmony colors

Complementary

#514f3f

Analogous

#3f4a51

#3f4151

#463f51

Triadic

#3f4151

#513f41

#41513f

Split-complementary

#3f4151

#51463f

#4a513f

Tetradic

#3f4151

#4f3f51

#514f3f

#41513f

Square

#3f4151

#513f4a

#514f3f

#3f5146

Shades

Color #3f4151 mixed toward black.

#343643

#2a2b36

#1f2028

#15161b

#0a0b0d

Tints

Color #3f4151 mixed toward white.

#5a5c73

#767994

#989baf

#babcca

#dddee4

Tones

Color #3f4151 mixed toward gray.

#40424f

#42434e

#43444c

#45464b

#464749

Accessibility

Aa White text on this color

10.07:1

Aa Black text on this color

2.09:1

White text reads better on this background (10.07:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#40404d · ΔE 1.6

Deuteranopia

#40404d · ΔE 1.6

Tritanopia

#3f4b4a · ΔE 12.5

Achromatopsia

#424242 · ΔE 8.8

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

Code

CSS

background-color: #3f4151;

Tailwind (arbitrary value)

bg-[#3f4151]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#3f4151 (#3f4151) is rgb(63, 65, 81) in RGB.

No, #3f4151 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.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #3f4151, or check how it holds up for accessibility.

Generate a palette → Check contrast