#1b379f

Color #1b379f

A vivid, highly saturated dark blue.

Closest named color Midnight Blue #191970 · ΔE 15.49 Nearest Tailwind class blue-900 #1c398e · ΔE 2.9

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Conversions

HEX

#1b379f

RGB

rgb(27, 55, 159)

HSL

hsl(227.3, 71%, 36.5%)

HSV / HSB

hsv(227.3, 83%, 62.4%)

CMYK

cmyk(83%, 65.4%, 0%, 37.6%)

LAB

lab(28.03, 30.02, -59.01)

LCH

lch(28.03, 66.21, 296.96)

OKLCH

oklch(39.1%, 0.1713, 266.32)

HWB

hwb(227.3, 10.6%, 37.6%)

Harmony colors

Complementary

#9f831b

Analogous

#1b799f

#1b379f

#411b9f

Triadic

#1b379f

#9f1b37

#379f1b

Split-complementary

#1b379f

#9f411b

#799f1b

Tetradic

#1b379f

#831b9f

#9f831b

#379f1b

Square

#1b379f

#9f1b79

#9f831b

#1b9f41

Shades

Color #1b379f mixed toward black.

#162e85

#12256a

#0d1b50

#091235

#04091b

Tints

Color #1b379f mixed toward white.

#2347cd

#4667e0

#758de8

#a3b3ef

#d1d9f7

Tones

Color #1b379f mixed toward gray.

#263d94

#314489

#3c4a7e

#475073

#525768

Accessibility

Aa White text on this color

10.03:1

Aa Black text on this color

2.09:1

White text reads better on this background (10.03:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2a2a8e · ΔE 4.8

Deuteranopia

#28268a · ΔE 5.8

Tritanopia

#1d7f7c · ΔE 36.9

Achromatopsia

#424242 · ΔE 26.7

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

Code

CSS

background-color: #1b379f;

Tailwind (arbitrary value)

bg-[#1b379f]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#1b379f (#1b379f) is rgb(27, 55, 159) in RGB.

No, #1b379f 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 #1b379f, or check how it holds up for accessibility.

Generate a palette → Check contrast