#283b5a

Color #283b5a

A muted dark blue.

Closest named color Charcoal #36454f · ΔE 14.66 Nearest Tailwind class slate-700 #314158 · ΔE 3.5

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Conversions

HEX

#283b5a

RGB

rgb(40, 59, 90)

HSL

hsl(217.2, 38.5%, 25.5%)

HSV / HSB

hsv(217.2, 55.6%, 35.3%)

CMYK

cmyk(55.6%, 34.4%, 0%, 64.7%)

LAB

lab(24.69, 2.54, -20.91)

LCH

lch(24.69, 21.06, 276.93)

OKLCH

oklch(35.2%, 0.0597, 259.88)

HWB

hwb(217.2, 15.7%, 64.7%)

Harmony colors

Complementary

#5a4728

Analogous

#28545a

#283b5a

#2e285a

Triadic

#283b5a

#5a283b

#3b5a28

Split-complementary

#283b5a

#5a2e28

#545a28

Tetradic

#283b5a

#47285a

#5a4728

#3b5a28

Square

#283b5a

#5a2854

#5a4728

#285a2e

Shades

Color #283b5a mixed toward black.

#21314b

#1b273c

#141e2d

#0d141e

#070a0f

Tints

Color #283b5a mixed toward white.

#3b5886

#5075b1

#7b97c5

#a7bad8

#d3dcec

Tones

Color #283b5a mixed toward gray.

#2c3c56

#303d52

#353e4e

#393f49

#3d4045

Accessibility

Aa White text on this color

11.27:1

Aa Black text on this color

1.86:1

White text reads better on this background (11.27:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#313154 · ΔE 7.3

Deuteranopia

#302f52 · ΔE 7.8

Tritanopia

#294e4d · ΔE 19.4

Achromatopsia

#3b3b3b · ΔE 14.4

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

Code

CSS

background-color: #283b5a;

Tailwind (arbitrary value)

bg-[#283b5a]

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

#283b5a (#283b5a) is rgb(40, 59, 90) in RGB.

No, #283b5a 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 #283b5a, or check how it holds up for accessibility.

Generate a palette → Check contrast