#171c2f

Color #171c2f

A muted very dark blue.

Closest named color Black #000000 · ΔE 17.6 Nearest Tailwind class slate-900 #0f172b · ΔE 1.9

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Conversions

HEX

#171c2f

RGB

rgb(23, 28, 47)

HSL

hsl(227.5, 34.3%, 13.7%)

HSV / HSB

hsv(227.5, 51.1%, 18.4%)

CMYK

cmyk(51.1%, 40.4%, 0%, 81.6%)

LAB

lab(10.69, 3.97, -13.41)

LCH

lch(10.69, 13.99, 286.49)

OKLCH

oklch(23.2%, 0.0376, 271.98)

HWB

hwb(227.5, 9%, 81.6%)

Harmony colors

Complementary

#2f2a17

Analogous

#17282f

#171c2f

#1e172f

Triadic

#171c2f

#2f171c

#1c2f17

Split-complementary

#171c2f

#2f1e17

#282f17

Tetradic

#171c2f

#2a172f

#2f2a17

#1c2f17

Square

#171c2f

#2f1728

#2f2a17

#172f1e

Shades

Color #171c2f mixed toward black.

#131727

#0f131f

#0b0e17

#080910

#040508

Tints

Color #171c2f mixed toward white.

#2f3960

#475791

#6b7bb7

#9ca7cf

#ced3e7

Tones

Color #171c2f mixed toward gray.

#191d2d

#1b1e2b

#1d1f29

#1f2127

#212225

Accessibility

Aa White text on this color

16.89:1

Aa Black text on this color

1.24:1

White text reads better on this background (16.89:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#19192b · ΔE 2.5

Deuteranopia

#19192a · ΔE 2.4

Tritanopia

#172827 · ΔE 15.9

Achromatopsia

#1d1d1d · ΔE 11

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

Code

CSS

background-color: #171c2f;

Tailwind (arbitrary value)

bg-[#171c2f]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#171c2f (#171c2f) is rgb(23, 28, 47) in RGB.

No, #171c2f 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 #171c2f, or check how it holds up for accessibility.

Generate a palette → Check contrast