#181a21

Color #181a21

A muted very dark blue.

Closest named color Black #000000 · ΔE 10.72 Nearest Tailwind class zinc-900 #18181b · ΔE 2.7

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Conversions

HEX

#181a21

RGB

rgb(24, 26, 33)

HSL

hsl(226.7, 15.8%, 11.2%)

HSV / HSB

hsv(226.7, 27.3%, 12.9%)

CMYK

cmyk(27.3%, 21.2%, 0%, 87.1%)

LAB

lab(9.34, 1.07, -5.15)

LCH

lch(9.34, 5.26, 281.74)

OKLCH

oklch(21.9%, 0.014, 272.86)

HWB

hwb(226.7, 9.4%, 87.1%)

Harmony colors

Complementary

#211f18

Analogous

#181f21

#181a21

#1b1821

Triadic

#181a21

#21181a

#1a2118

Split-complementary

#181a21

#211b18

#1f2118

Tetradic

#181a21

#1f1821

#211f18

#1a2118

Square

#181a21

#21181f

#211f18

#18211b

Shades

Color #181a21 mixed toward black.

#14161c

#101116

#0c0d11

#08090b

#040406

Tints

Color #181a21 mixed toward white.

#383c4d

#585f78

#7c84a0

#a8adbf

#d3d6df

Tones

Color #181a21 mixed toward gray.

#191a20

#1a1b20

#1a1b1f

#1b1c1e

#1c1c1d

Accessibility

Aa White text on this color

17.38:1

Aa Black text on this color

1.21:1

White text reads better on this background (17.38:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#19191f · ΔE 1.3

Deuteranopia

#19191f · ΔE 1.3

Tritanopia

#181e1e · ΔE 6.4

Achromatopsia

#1a1a1a · ΔE 4.8

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

Code

CSS

background-color: #181a21;

Tailwind (arbitrary value)

bg-[#181a21]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#181a21 (#181a21) is rgb(24, 26, 33) in RGB.

No, #181a21 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 #181a21, or check how it holds up for accessibility.

Generate a palette → Check contrast