#1b2337

Color #1b2337

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 16.95 Nearest Tailwind class slate-800 #1d293d · ΔE 2.6

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Conversions

HEX

#1b2337

RGB

rgb(27, 35, 55)

HSL

hsl(222.9, 34.1%, 16.1%)

HSV / HSB

hsv(222.9, 50.9%, 21.6%)

CMYK

cmyk(50.9%, 36.4%, 0%, 78.4%)

LAB

lab(13.89, 3, -14.12)

LCH

lch(13.89, 14.44, 281.99)

OKLCH

oklch(25.9%, 0.0396, 266.96)

HWB

hwb(222.9, 10.6%, 78.4%)

Harmony colors

Complementary

#372f1b

Analogous

#1b3137

#1b2337

#211b37

Triadic

#1b2337

#371b23

#23371b

Split-complementary

#1b2337

#37211b

#31371b

Tetradic

#1b2337

#2f1b37

#372f1b

#23371b

Square

#1b2337

#371b31

#372f1b

#1b3721

Shades

Color #1b2337 mixed toward black.

#171d2e

#121725

#0e121c

#090c12

#050609

Tints

Color #1b2337 mixed toward white.

#334167

#4a6097

#7084b9

#9fadd0

#cfd6e8

Tones

Color #1b2337 mixed toward gray.

#1d2435

#202532

#222630

#24272e

#27282b

Accessibility

Aa White text on this color

15.65:1

Aa Black text on this color

1.34:1

White text reads better on this background (15.65:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#1f1f33 · ΔE 3.9

Deuteranopia

#1e1e32 · ΔE 4

Tritanopia

#1b2f2f · ΔE 15.3

Achromatopsia

#232323 · ΔE 11.1

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

Code

CSS

background-color: #1b2337;

Tailwind (arbitrary value)

bg-[#1b2337]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1b2337 (#1b2337) is rgb(27, 35, 55) in RGB.

No, #1b2337 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 #1b2337, or check how it holds up for accessibility.

Generate a palette → Check contrast