#172b4b

Color #172b4b

A moderately saturated very dark blue.

Closest named color Charcoal #36454f · ΔE 19.3 Nearest Tailwind class slate-800 #1d293d · ΔE 4.4

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#172b4b

RGB

rgb(23, 43, 75)

HSL

hsl(216.9, 53.1%, 19.2%)

HSV / HSB

hsv(216.9, 69.3%, 29.4%)

CMYK

cmyk(69.3%, 42.7%, 0%, 70.6%)

LAB

lab(17.54, 3.86, -22.25)

LCH

lch(17.54, 22.58, 279.84)

OKLCH

oklch(29%, 0.0643, 259.42)

HWB

hwb(216.9, 9%, 70.6%)

Harmony colors

Complementary

#4b3717

Analogous

#17454b

#172b4b

#1d174b

Triadic

#172b4b

#4b172b

#2b4b17

Split-complementary

#172b4b

#4b1d17

#454b17

Tetradic

#172b4b

#37174b

#4b3717

#2b4b17

Square

#172b4b

#4b1745

#4b3717

#174b1d

Shades

Color #172b4b mixed toward black.

#13243e

#0f1d32

#0b1525

#080e19

#04070c

Tints

Color #172b4b mixed toward white.

#274980

#3767b4

#618bcf

#96b2df

#cad8ef

Tones

Color #172b4b mixed toward gray.

#1b2c47

#202d42

#242e3e

#282f3a

#2d3035

Accessibility

Aa White text on this color

14.15:1

Aa Black text on this color

1.48:1

White text reads better on this background (14.15:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#212145 · ΔE 6.8

Deuteranopia

#201e43 · ΔE 7.8

Tritanopia

#183f3e · ΔE 20.6

Achromatopsia

#2b2b2b · ΔE 15.1

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

Code

CSS

background-color: #172b4b;

Tailwind (arbitrary value)

bg-[#172b4b]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Royal Blue #4169e1

Frequently asked questions

#172b4b (#172b4b) is rgb(23, 43, 75) in RGB.

No, #172b4b 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.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #172b4b, or check how it holds up for accessibility.

Generate a palette → Check contrast