#0a51bb

Color #0a51bb

A vivid, highly saturated dark blue.

Closest named color Royal Blue #4169e1 · ΔE 12.17 Nearest Tailwind class blue-800 #193cb8 · ΔE 7.2

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

Conversions

HEX

#0a51bb

RGB

rgb(10, 81, 187)

HSL

hsl(215.9, 89.8%, 38.6%)

HSV / HSB

hsv(215.9, 94.7%, 73.3%)

CMYK

cmyk(94.7%, 56.7%, 0%, 26.7%)

LAB

lab(37, 22.64, -61.06)

LCH

lch(37, 65.12, 290.34)

OKLCH

oklch(46.5%, 0.1795, 259.89)

HWB

hwb(215.9, 3.9%, 26.7%)

Harmony colors

Complementary

#bb740a

Analogous

#0aa9bb

#0a51bb

#1b0abb

Triadic

#0a51bb

#bb0a51

#51bb0a

Split-complementary

#0a51bb

#bb1b0a

#a9bb0a

Tetradic

#0a51bb

#740abb

#bb740a

#51bb0a

Square

#0a51bb

#bb0aa9

#bb740a

#0abb1b

Shades

Color #0a51bb mixed toward black.

#08449c

#07367d

#05295d

#031b3e

#020e1f

Tints

Color #0a51bb mixed toward white.

#0d67ec

#3984f4

#6aa3f7

#9cc2fa

#cde0fc

Tones

Color #0a51bb mixed toward gray.

#1954ac

#28579d

#365a8f

#455d80

#546071

Accessibility

Aa White text on this color

7.22:1

Aa Black text on this color

2.91:1

White text reads better on this background (7.22:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3637a9 · ΔE 9.9

Deuteranopia

#332ea4 · ΔE 12.1

Tritanopia

#149995 · ΔE 38.4

Achromatopsia

#575757 · ΔE 26.5

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

Code

CSS

background-color: #0a51bb;

Tailwind (arbitrary value)

bg-[#0a51bb]

Related colors

Light Steel Blue #b0c4de

Cornflower Blue #6495ed

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Frequently asked questions

#0a51bb (#0a51bb) is rgb(10, 81, 187) in RGB.

No, #0a51bb 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.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #0a51bb, or check how it holds up for accessibility.

Generate a palette → Check contrast