#284f8d

Color #284f8d

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 18.41 Nearest Tailwind class sky-800 #00598a · ΔE 7

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Conversions

HEX

#284f8d

RGB

rgb(40, 79, 141)

HSL

hsl(216.8, 55.8%, 35.5%)

HSV / HSB

hsv(216.8, 71.6%, 55.3%)

CMYK

cmyk(71.6%, 44%, 0%, 44.7%)

LAB

lab(33.91, 8.26, -38.48)

LCH

lch(33.91, 39.36, 282.12)

OKLCH

oklch(43.3%, 0.1118, 259.33)

HWB

hwb(216.8, 15.7%, 44.7%)

Harmony colors

Complementary

#8d6628

Analogous

#28828d

#284f8d

#33288d

Triadic

#284f8d

#8d284f

#4f8d28

Split-complementary

#284f8d

#8d3328

#828d28

Tetradic

#284f8d

#66288d

#8d6628

#4f8d28

Square

#284f8d

#8d2882

#8d6628

#288d33

Shades

Color #284f8d mixed toward black.

#214276

#1b355e

#142847

#0d1a2f

#070d18

Tints

Color #284f8d mixed toward white.

#3467b8

#5483cf

#7fa2db

#aac1e7

#d4e0f3

Tones

Color #284f8d mixed toward gray.

#305185

#39537c

#415574

#4a576b

#525963

Accessibility

Aa White text on this color

8.1:1

Aa Black text on this color

2.59:1

White text reads better on this background (8.1:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3c3d81 · ΔE 8.9

Deuteranopia

#3a377e · ΔE 10.5

Tritanopia

#2b7775 · ΔE 27.2

Achromatopsia

#505050 · ΔE 21

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

Code

CSS

background-color: #284f8d;

Tailwind (arbitrary value)

bg-[#284f8d]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Royal Blue #4169e1

Frequently asked questions

#284f8d (#284f8d) is rgb(40, 79, 141) in RGB.

No, #284f8d 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 #284f8d, or check how it holds up for accessibility.

Generate a palette → Check contrast