#283f86

Color #283f86

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 9.89 Nearest Tailwind class blue-900 #1c398e · ΔE 2.6

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

Conversions

HEX

#283f86

RGB

rgb(40, 63, 134)

HSL

hsl(225.3, 54%, 34.1%)

HSV / HSB

hsv(225.3, 70.1%, 52.5%)

CMYK

cmyk(70.1%, 53%, 0%, 47.5%)

LAB

lab(28.71, 16.4, -42.52)

LCH

lch(28.71, 45.57, 291.09)

OKLCH

oklch(39.1%, 0.1223, 267.09)

HWB

hwb(225.3, 15.7%, 47.5%)

Harmony colors

Complementary

#866f28

Analogous

#286e86

#283f86

#402886

Triadic

#283f86

#86283f

#3f8628

Split-complementary

#283f86

#864028

#6e8628

Tetradic

#283f86

#6f2886

#866f28

#3f8628

Square

#283f86

#86286e

#866f28

#288640

Shades

Color #283f86 mixed toward black.

#213570

#1b2a59

#142043

#0d152d

#070b16

Tints

Color #283f86 mixed toward white.

#3553b1

#5270cb

#7e94d8

#a9b8e5

#d4dbf2

Tones

Color #283f86 mixed toward gray.

#30437e

#384776

#3f4b6e

#474f67

#4f535f

Accessibility

Aa White text on this color

9.79:1

Aa Black text on this color

2.15:1

White text reads better on this background (9.79:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#333479 · ΔE 5.1

Deuteranopia

#323076 · ΔE 6.3

Tritanopia

#296e6c · ΔE 29.6

Achromatopsia

#444444 · ΔE 22.8

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

Code

CSS

background-color: #283f86;

Tailwind (arbitrary value)

bg-[#283f86]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#283f86 (#283f86) is rgb(40, 63, 134) in RGB.

No, #283f86 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 #283f86, or check how it holds up for accessibility.

Generate a palette → Check contrast