#1b3666

Color #1b3666

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 22.58 Nearest Tailwind class blue-950 #162456 · ΔE 6.2

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Conversions

HEX

#1b3666

RGB

rgb(27, 54, 102)

HSL

hsl(218.4, 58.1%, 25.3%)

HSV / HSB

hsv(218.4, 73.5%, 40%)

CMYK

cmyk(73.5%, 47.1%, 0%, 60%)

LAB

lab(23.1, 7.78, -31.29)

LCH

lch(23.1, 32.24, 283.96)

OKLCH

oklch(34%, 0.0906, 260.92)

HWB

hwb(218.4, 10.6%, 60%)

Harmony colors

Complementary

#664b1b

Analogous

#1b5c66

#1b3666

#261b66

Triadic

#1b3666

#661b36

#36661b

Split-complementary

#1b3666

#66261b

#5c661b

Tetradic

#1b3666

#4b1b66

#664b1b

#36661b

Square

#1b3666

#661b5c

#664b1b

#1b6626

Shades

Color #1b3666 mixed toward black.

#172d55

#122444

#0e1b33

#091222

#050911

Tints

Color #1b3666 mixed toward white.

#285198

#366bca

#6890d7

#9bb5e4

#cddaf2

Tones

Color #1b3666 mixed toward gray.

#213860

#283a5a

#2e3b53

#343d4d

#3a3f47

Accessibility

Aa White text on this color

11.89:1

Aa Black text on this color

1.77:1

White text reads better on this background (11.89:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#29295d · ΔE 6.9

Deuteranopia

#27255b · ΔE 7.8

Tritanopia

#1d5553 · ΔE 24.8

Achromatopsia

#373737 · ΔE 19

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

Code

CSS

background-color: #1b3666;

Tailwind (arbitrary value)

bg-[#1b3666]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1b3666 (#1b3666) is rgb(27, 54, 102) in RGB.

No, #1b3666 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 #1b3666, or check how it holds up for accessibility.

Generate a palette → Check contrast