#1b1c31

Color #1b1c31

A muted very dark blue.

Closest named color Black #000000 · ΔE 18.97 Nearest Tailwind class slate-900 #0f172b · ΔE 3.5

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Conversions

HEX

#1b1c31

RGB

rgb(27, 28, 49)

HSL

hsl(237.3, 28.9%, 14.9%)

HSV / HSB

hsv(237.3, 44.9%, 19.2%)

CMYK

cmyk(44.9%, 42.9%, 0%, 80.8%)

LAB

lab(11.17, 6.07, -14.08)

LCH

lch(11.17, 15.33, 293.32)

OKLCH

oklch(23.7%, 0.0401, 280.78)

HWB

hwb(237.3, 10.6%, 80.8%)

Harmony colors

Complementary

#31301b

Analogous

#1b2731

#1b1c31

#251b31

Triadic

#1b1c31

#311b1c

#1c311b

Split-complementary

#1b1c31

#31251b

#27311b

Tetradic

#1b1c31

#301b31

#31301b

#1c311b

Square

#1b1c31

#311b27

#31301b

#1b3125

Shades

Color #1b1c31 mixed toward black.

#171729

#121321

#0e0e18

#090910

#050508

Tints

Color #1b1c31 mixed toward white.

#353760

#4e518e

#7376b2

#a2a4cc

#d0d1e5

Tones

Color #1b1c31 mixed toward gray.

#1d1e2f

#1f1f2d

#21212b

#22232a

#242428

Accessibility

Aa White text on this color

16.71:1

Aa Black text on this color

1.26:1

White text reads better on this background (16.71:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#1b1b2d · ΔE 1.4

Deuteranopia

#1b1b2c · ΔE 1.9

Tritanopia

#1b2928 · ΔE 17

Achromatopsia

#1e1e1e · ΔE 12.2

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

Code

CSS

background-color: #1b1c31;

Tailwind (arbitrary value)

bg-[#1b1c31]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#1b1c31 (#1b1c31) is rgb(27, 28, 49) in RGB.

No, #1b1c31 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 #1b1c31, or check how it holds up for accessibility.

Generate a palette → Check contrast