#1f233a

Color #1f233a

A muted very dark blue.

Closest named color Charcoal #36454f · ΔE 18.07 Nearest Tailwind class slate-900 #0f172b · ΔE 4.4

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

Conversions

HEX

#1f233a

RGB

rgb(31, 35, 58)

HSL

hsl(231.1, 30.3%, 17.5%)

HSV / HSB

hsv(231.1, 46.6%, 22.7%)

CMYK

cmyk(46.6%, 39.7%, 0%, 77.3%)

LAB

lab(14.39, 5.39, -15.43)

LCH

lch(14.39, 16.34, 289.26)

OKLCH

oklch(26.4%, 0.0434, 275.55)

HWB

hwb(231.1, 12.2%, 77.3%)

Harmony colors

Complementary

#3a361f

Analogous

#1f313a

#1f233a

#291f3a

Triadic

#1f233a

#3a1f23

#233a1f

Split-complementary

#1f233a

#3a291f

#313a1f

Tetradic

#1f233a

#361f3a

#3a361f

#233a1f

Square

#1f233a

#3a1f31

#3a361f

#1f3a29

Shades

Color #1f233a mixed toward black.

#1a1d30

#151727

#10121d

#0a0c13

#05060a

Tints

Color #1f233a mixed toward white.

#383f68

#505a96

#767fb6

#a4aace

#d1d4e7

Tones

Color #1f233a mixed toward gray.

#212538

#242636

#262833

#282931

#2a2b2f

Accessibility

Aa White text on this color

15.44:1

Aa Black text on this color

1.36:1

White text reads better on this background (15.44:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#212135 · ΔE 2

Deuteranopia

#212034 · ΔE 2.4

Tritanopia

#1f3131 · ΔE 17.2

Achromatopsia

#242424 · ΔE 12.5

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

Code

CSS

background-color: #1f233a;

Tailwind (arbitrary value)

bg-[#1f233a]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#1f233a (#1f233a) is rgb(31, 35, 58) in RGB.

No, #1f233a 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 #1f233a, or check how it holds up for accessibility.

Generate a palette → Check contrast