#0a399b

Color #0a399b

A vivid, highly saturated dark blue.

Closest named color Midnight Blue #191970 · ΔE 15.16 Nearest Tailwind class blue-900 #1c398e · ΔE 2

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Conversions

HEX

#0a399b

RGB

rgb(10, 57, 155)

HSL

hsl(220.6, 87.9%, 32.4%)

HSV / HSB

hsv(220.6, 93.5%, 60.8%)

CMYK

cmyk(93.5%, 63.2%, 0%, 39.2%)

LAB

lab(27.73, 26.01, -57.08)

LCH

lch(27.73, 62.73, 294.5)

OKLCH

oklch(38.7%, 0.1668, 262.49)

HWB

hwb(220.6, 3.9%, 39.2%)

Harmony colors

Complementary

#9b6c0a

Analogous

#0a829b

#0a399b

#240a9b

Triadic

#0a399b

#9b0a39

#399b0a

Split-complementary

#0a399b

#9b240a

#829b0a

Tetradic

#0a399b

#6c0a9b

#9b6c0a

#399b0a

Square

#0a399b

#9b0a82

#9b6c0a

#0a9b24

Shades

Color #0a399b mixed toward black.

#082f81

#072667

#051c4e

#031334

#02091a

Tints

Color #0a399b mixed toward white.

#0d4dd1

#2768f1

#5d8ef5

#93b4f8

#c9d9fc

Tones

Color #0a399b mixed toward gray.

#163d8f

#224283

#2e4677

#3a4a6b

#474e5f

Accessibility

Aa White text on this color

10.14:1

Aa Black text on this color

2.07:1

White text reads better on this background (10.14:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#26268b · ΔE 6.8

Deuteranopia

#242087 · ΔE 8.3

Tritanopia

#0f7d79 · ΔE 36.5

Achromatopsia

#414141 · ΔE 26.1

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

Code

CSS

background-color: #0a399b;

Tailwind (arbitrary value)

bg-[#0a399b]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#0a399b (#0a399b) is rgb(10, 57, 155) in RGB.

No, #0a399b 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 #0a399b, or check how it holds up for accessibility.

Generate a palette → Check contrast