#1d1d21

Color #1d1d21

A nearly neutral, gray-leaning very dark blue.

Closest named color Black #000000 · ΔE 11.3 Nearest Tailwind class zinc-900 #18181b · ΔE 1.7

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Conversions

HEX

#1d1d21

RGB

rgb(29, 29, 33)

HSL

hsl(240, 6.5%, 12.2%)

HSV / HSB

hsv(240, 12.1%, 12.9%)

CMYK

cmyk(12.1%, 12.1%, 0%, 87.1%)

LAB

lab(10.92, 1.05, -2.73)

LCH

lch(10.92, 2.92, 291.04)

OKLCH

oklch(23.2%, 0.0076, 286.05)

HWB

hwb(240, 11.4%, 87.1%)

Harmony colors

Complementary

#21211d

Analogous

#1d1f21

#1d1d21

#1f1d21

Triadic

#1d1d21

#211d1d

#1d211d

Split-complementary

#1d1d21

#211f1d

#1f211d

Tetradic

#1d1d21

#211d21

#21211d

#1d211d

Square

#1d1d21

#211d1f

#21211d

#1d211f

Shades

Color #1d1d21 mixed toward black.

#18181c

#131316

#0f0f11

#0a0a0b

#050506

Tints

Color #1d1d21 mixed toward white.

#404049

#636371

#888896

#b0b0b9

#d7d7dc

Tones

Color #1d1d21 mixed toward gray.

#1d1d21

#1e1e20

#1f1f1f

Accessibility

Aa White text on this color

16.8:1

Aa Black text on this color

1.25:1

White text reads better on this background (16.8:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#1d1d20 · ΔE 0.7

Deuteranopia

#1d1d20 · ΔE 0.7

Tritanopia

#1d1f1f · ΔE 3.6

Achromatopsia

#1d1d1d · ΔE 2.9

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

Code

CSS

background-color: #1d1d21;

Tailwind (arbitrary value)

bg-[#1d1d21]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#1d1d21 (#1d1d21) is rgb(29, 29, 33) in RGB.

No, #1d1d21 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 #1d1d21, or check how it holds up for accessibility.

Generate a palette → Check contrast