#1b00a3

Color #1b00a3

A vivid, highly saturated dark blue.

Closest named color Dark Blue #00008b · ΔE 10.61 Nearest Tailwind class violet-900 #4d179a · ΔE 6.1

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

Conversions

HEX

#1b00a3

RGB

rgb(27, 0, 163)

HSL

hsl(249.9, 100%, 32%)

HSV / HSB

hsv(249.9, 100%, 63.9%)

CMYK

cmyk(83.4%, 100%, 0%, 36.1%)

LAB

lab(19.54, 56.99, -75.5)

LCH

lch(19.54, 94.59, 307.05)

OKLCH

oklch(33.3%, 0.2179, 270.08)

HWB

hwb(249.9, 0%, 36.1%)

Harmony colors

Complementary

#88a300

Analogous

#0037a3

#1b00a3

#6d00a3

Triadic

#1b00a3

#a31b00

#00a31b

Split-complementary

#1b00a3

#a36d00

#37a300

Tetradic

#1b00a3

#a30088

#88a300

#00a31b

Square

#1b00a3

#a30037

#88a300

#00a36d

Shades

Color #1b00a3 mixed toward black.

#160088

#12006d

#0d0052

#090036

#04001b

Tints

Color #1b00a3 mixed toward white.

#2400dd

#3e18ff

#6e52ff

#9e8bff

#cfc5ff

Tones

Color #1b00a3 mixed toward gray.

#240e96

#2d1b88

#36297a

#3f366d

#48445f

Accessibility

Aa White text on this color

13.33:1

Aa Black text on this color

1.58:1

White text reads better on this background (13.33:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#121290 · ΔE 3.3

Deuteranopia

#14158b · ΔE 4.1

Tritanopia

#1a7e79 · ΔE 43.1

Achromatopsia

#2f2f2f · ΔE 30.2

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

Code

CSS

background-color: #1b00a3;

Tailwind (arbitrary value)

bg-[#1b00a3]

Related colors

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Medium Purple #9370db

Navy #000080

Lavender #e6e6fa

Frequently asked questions

#1b00a3 (#1b00a3) is rgb(27, 0, 163) in RGB.

No, #1b00a3 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 #1b00a3, or check how it holds up for accessibility.

Generate a palette → Check contrast