#0a3378

Color #0a3378

A vivid, highly saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 13.14 Nearest Tailwind class blue-900 #1c398e · ΔE 3.8

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

Conversions

HEX

#0a3378

RGB

rgb(10, 51, 120)

HSL

hsl(217.6, 84.6%, 25.5%)

HSV / HSB

hsv(217.6, 91.7%, 47.1%)

CMYK

cmyk(91.7%, 57.5%, 0%, 52.9%)

LAB

lab(22.96, 15.58, -43.1)

LCH

lch(22.96, 45.83, 289.87)

OKLCH

oklch(34.1%, 0.1263, 260.57)

HWB

hwb(217.6, 3.9%, 52.9%)

Harmony colors

Complementary

#784f0a

Analogous

#0a6a78

#0a3378

#180a78

Triadic

#0a3378

#780a33

#33780a

Split-complementary

#0a3378

#78180a

#6a780a

Tetradic

#0a3378

#4f0a78

#784f0a

#33780a

Square

#0a3378

#780a6a

#784f0a

#0a7818

Shades

Color #0a3378 mixed toward black.

#082b64

#072250

#051a3c

#031128

#020914

Tints

Color #0a3378 mixed toward white.

#0f4cb2

#1565eb

#508cf0

#8ab2f5

#c5d9fa

Tones

Color #0a3378 mixed toward gray.

#13356f

#1c3866

#263a5d

#2f3c53

#383f4a

Accessibility

Aa White text on this color

11.95:1

Aa Black text on this color

1.76:1

White text reads better on this background (11.95:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#22226c · ΔE 7.3

Deuteranopia

#201d69 · ΔE 8.5

Tritanopia

#0e615f · ΔE 29.7

Achromatopsia

#373737 · ΔE 22.8

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

Code

CSS

background-color: #0a3378;

Tailwind (arbitrary value)

bg-[#0a3378]

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

#0a3378 (#0a3378) is rgb(10, 51, 120) in RGB.

No, #0a3378 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #0a3378, or check how it holds up for accessibility.

Generate a palette → Check contrast