#1b1f31

Color #1b1f31

A muted very dark blue.

Closest named color Black #000000 · ΔE 17.87 Nearest Tailwind class slate-900 #0f172b · ΔE 3

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Conversions

HEX

#1b1f31

RGB

rgb(27, 31, 49)

HSL

hsl(229.1, 28.9%, 14.9%)

HSV / HSB

hsv(229.1, 44.9%, 19.2%)

CMYK

cmyk(44.9%, 36.7%, 0%, 80.8%)

LAB

lab(12.19, 3.82, -12.49)

LCH

lch(12.19, 13.06, 287.01)

OKLCH

oklch(24.4%, 0.0349, 273.95)

HWB

hwb(229.1, 10.6%, 80.8%)

Harmony colors

Complementary

#312d1b

Analogous

#1b2a31

#1b1f31

#221b31

Triadic

#1b1f31

#311b1f

#1f311b

Split-complementary

#1b1f31

#31221b

#2a311b

Tetradic

#1b1f31

#2d1b31

#312d1b

#1f311b

Square

#1b1f31

#311b2a

#312d1b

#1b3122

Shades

Color #1b1f31 mixed toward black.

#171a29

#121521

#0e1018

#090a10

#050508

Tints

Color #1b1f31 mixed toward white.

#353d60

#4e5a8e

#737fb2

#a2a9cc

#d0d4e5

Tones

Color #1b1f31 mixed toward gray.

#1d202f

#1f212d

#21222b

#22242a

#242528

Accessibility

Aa White text on this color

16.32:1

Aa Black text on this color

1.29:1

White text reads better on this background (16.32:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#1d1d2d · ΔE 2

Deuteranopia

#1d1c2c · ΔE 2.5

Tritanopia

#1b2a29 · ΔE 15

Achromatopsia

#202020 · ΔE 10.5

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

Code

CSS

background-color: #1b1f31;

Tailwind (arbitrary value)

bg-[#1b1f31]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#1b1f31 (#1b1f31) is rgb(27, 31, 49) in RGB.

No, #1b1f31 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.

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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 #1b1f31, or check how it holds up for accessibility.

Generate a palette → Check contrast