#1f51ad

Color #1f51ad

A moderately saturated medium blue.

Closest named color Dark Slate Blue #483d8b · ΔE 15.09 Nearest Tailwind class blue-800 #193cb8 · ΔE 7.4

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

Conversions

HEX

#1f51ad

RGB

rgb(31, 81, 173)

HSL

hsl(218.9, 69.6%, 40%)

HSV / HSB

hsv(218.9, 82.1%, 67.8%)

CMYK

cmyk(82.1%, 53.2%, 0%, 32.2%)

LAB

lab(36.35, 18.36, -53.83)

LCH

lch(36.35, 56.87, 288.83)

OKLCH

oklch(45.8%, 0.157, 261.28)

HWB

hwb(218.9, 12.2%, 32.2%)

Harmony colors

Complementary

#ad7b1f

Analogous

#1f98ad

#1f51ad

#341fad

Triadic

#1f51ad

#ad1f51

#51ad1f

Split-complementary

#1f51ad

#ad341f

#98ad1f

Tetradic

#1f51ad

#7b1fad

#ad7b1f

#51ad1f

Square

#1f51ad

#ad1f98

#ad7b1f

#1fad34

Shades

Color #1f51ad mixed toward black.

#1a4390

#153673

#102856

#0a1b3a

#050d1d

Tints

Color #1f51ad mixed toward white.

#2765d8

#5284e0

#7da3e8

#a9c1ef

#d4e0f7

Tones

Color #1f51ad mixed toward gray.

#2b54a1

#375895

#435b89

#4e5f7e

#5a6272

Accessibility

Aa White text on this color

7.4:1

Aa Black text on this color

2.84:1

White text reads better on this background (7.4:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3b3b9d · ΔE 9.1

Deuteranopia

#383499 · ΔE 10.9

Tritanopia

#238e8b · ΔE 34.7

Achromatopsia

#555555 · ΔE 25

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

Code

CSS

background-color: #1f51ad;

Tailwind (arbitrary value)

bg-[#1f51ad]

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

#1f51ad (#1f51ad) is rgb(31, 81, 173) in RGB.

No, #1f51ad 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 #1f51ad, or check how it holds up for accessibility.

Generate a palette → Check contrast