#231f3b

Color #231f3b

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 22.05 Nearest Tailwind class slate-900 #0f172b · ΔE 7

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

Conversions

HEX

#231f3b

RGB

rgb(35, 31, 59)

HSL

hsl(248.6, 31.1%, 17.6%)

HSV / HSB

hsv(248.6, 47.5%, 23.1%)

CMYK

cmyk(40.7%, 47.5%, 0%, 76.9%)

LAB

lab(13.55, 10.03, -17.43)

LCH

lch(13.55, 20.11, 299.92)

OKLCH

oklch(25.9%, 0.0518, 288.82)

HWB

hwb(248.6, 12.2%, 76.9%)

Harmony colors

Complementary

#373b1f

Analogous

#1f293b

#231f3b

#311f3b

Triadic

#231f3b

#3b231f

#1f3b23

Split-complementary

#231f3b

#3b311f

#293b1f

Tetradic

#231f3b

#3b1f37

#373b1f

#1f3b23

Square

#231f3b

#3b1f29

#373b1f

#1f3b31

Shades

Color #231f3b mixed toward black.

#1d1a31

#171527

#110f1d

#0c0a14

#06050a

Tints

Color #231f3b mixed toward white.

#3e3769

#594f97

#7f75b7

#a9a3cf

#d4d1e7

Tones

Color #231f3b mixed toward gray.

#252139

#262436

#282634

#2a2832

#2b2b2f

Accessibility

Aa White text on this color

15.78:1

Aa Black text on this color

1.33:1

White text reads better on this background (15.78:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#212136 · ΔE 3.6

Deuteranopia

#222234 · ΔE 5

Tritanopia

#233130 · ΔE 20.2

Achromatopsia

#232323 · ΔE 15.1

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

Code

CSS

background-color: #231f3b;

Tailwind (arbitrary value)

bg-[#231f3b]

Related colors

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#231f3b (#231f3b) is rgb(35, 31, 59) in RGB.

No, #231f3b 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 #231f3b, or check how it holds up for accessibility.

Generate a palette → Check contrast