#181c31

Color #181c31

A muted very dark blue.

Closest named color Black #000000 · ΔE 18.85 Nearest Tailwind class slate-900 #0f172b · ΔE 2.4

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

Conversions

HEX

#181c31

RGB

rgb(24, 28, 49)

HSL

hsl(230.4, 34.2%, 14.3%)

HSV / HSB

hsv(230.4, 51%, 19.2%)

CMYK

cmyk(51%, 42.9%, 0%, 80.8%)

LAB

lab(10.9, 5.05, -14.53)

LCH

lch(10.9, 15.38, 289.17)

OKLCH

oklch(23.4%, 0.0409, 274.62)

HWB

hwb(230.4, 9.4%, 80.8%)

Harmony colors

Complementary

#312d18

Analogous

#182831

#181c31

#201831

Triadic

#181c31

#31181c

#1c3118

Split-complementary

#181c31

#312018

#283118

Tetradic

#181c31

#2d1831

#312d18

#1c3118

Square

#181c31

#311828

#312d18

#183120

Shades

Color #181c31 mixed toward black.

#141729

#101321

#0c0e18

#080910

#040508

Tints

Color #181c31 mixed toward white.

#303862

#485493

#6c78b7

#9da5cf

#ced2e7

Tones

Color #181c31 mixed toward gray.

#1a1d2f

#1c1f2d

#1e202b

#202229

#222327

Accessibility

Aa White text on this color

16.81:1

Aa Black text on this color

1.25:1

White text reads better on this background (16.81:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#1a1a2d · ΔE 1.9

Deuteranopia

#1a192c · ΔE 2.4

Tritanopia

#182928 · ΔE 17

Achromatopsia

#1d1d1d · ΔE 12

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

Code

CSS

background-color: #181c31;

Tailwind (arbitrary value)

bg-[#181c31]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#181c31 (#181c31) is rgb(24, 28, 49) in RGB.

No, #181c31 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 #181c31, or check how it holds up for accessibility.

Generate a palette → Check contrast