#12172a

Color #12172a

A moderately saturated very dark blue.

Closest named color Black #000000 · ΔE 16.5 Nearest Tailwind class slate-900 #0f172b · ΔE 1.1

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Conversions

HEX

#12172a

RGB

rgb(18, 23, 42)

HSL

hsl(227.5, 40%, 11.8%)

HSV / HSB

hsv(227.5, 57.1%, 16.5%)

CMYK

cmyk(57.1%, 45.2%, 0%, 83.5%)

LAB

lab(8.2, 4.26, -13.67)

LCH

lch(8.2, 14.32, 287.31)

OKLCH

oklch(21%, 0.0385, 271.64)

HWB

hwb(227.5, 7.1%, 83.5%)

Harmony colors

Complementary

#2a2512

Analogous

#12232a

#12172a

#19122a

Triadic

#12172a

#2a1217

#172a12

Split-complementary

#12172a

#2a1912

#232a12

Tetradic

#12172a

#25122a

#2a2512

#172a12

Square

#12172a

#2a1223

#2a2512

#122a19

Shades

Color #12172a mixed toward black.

#0f1323

#0c0f1c

#090c15

#06080e

#030407

Tints

Color #12172a mixed toward white.

#29345f

#3f5193

#6274bc

#96a3d2

#cbd1e9

Tones

Color #12172a mixed toward gray.

#141828

#161926

#181b24

#1a1c22

#1c1d20

Accessibility

Aa White text on this color

17.77:1

Aa Black text on this color

1.18:1

White text reads better on this background (17.77:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#141426 · ΔE 2.3

Deuteranopia

#141425 · ΔE 2.3

Tritanopia

#122322 · ΔE 16.2

Achromatopsia

#181818 · ΔE 11.3

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

Code

CSS

background-color: #12172a;

Tailwind (arbitrary value)

bg-[#12172a]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#12172a (#12172a) is rgb(18, 23, 42) in RGB.

No, #12172a 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 #12172a, or check how it holds up for accessibility.

Generate a palette → Check contrast