#00378c

Color #00378c

A vivid, highly saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 11.85 Nearest Tailwind class blue-900 #1c398e · ΔE 1.8

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

Conversions

HEX

#00378c

RGB

rgb(0, 55, 140)

HSL

hsl(216.4, 100%, 27.5%)

HSV / HSB

hsv(216.4, 100%, 54.9%)

CMYK

cmyk(100%, 60.7%, 0%, 45.1%)

LAB

lab(25.64, 20.69, -51.29)

LCH

lch(25.64, 55.31, 291.97)

OKLCH

oklch(36.6%, 0.1508, 260.19)

HWB

hwb(216.4, 0%, 45.1%)

Harmony colors

Complementary

#8c5500

Analogous

#007d8c

#00378c

#0f008c

Triadic

#00378c

#8c0037

#378c00

Split-complementary

#00378c

#8c0f00

#7d8c00

Tetradic

#00378c

#55008c

#8c5500

#378c00

Square

#00378c

#8c007d

#8c5500

#008c0f

Shades

Color #00378c mixed toward black.

#002e75

#00255e

#001c46

#00122f

#000917

Tints

Color #00378c mixed toward white.

#004fca

#0869ff

#468fff

#84b4ff

#c1daff

Tones

Color #00378c mixed toward gray.

#0c3a81

#173c75

#233f69

#2f415e

#3a4452

Accessibility

Aa White text on this color

10.91:1

Aa Black text on this color

1.93:1

White text reads better on this background (10.91:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#23237e · ΔE 7.7

Deuteranopia

#201c7a · ΔE 9.4

Tritanopia

#06716e · ΔE 33.5

Achromatopsia

#3d3d3d · ΔE 24.8

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

Code

CSS

background-color: #00378c;

Tailwind (arbitrary value)

bg-[#00378c]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Frequently asked questions

#00378c (#00378c) is rgb(0, 55, 140) in RGB.

No, #00378c 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 #00378c, or check how it holds up for accessibility.

Generate a palette → Check contrast