#283d51

Color #283d51

A muted dark blue.

Closest named color Charcoal #36454f · ΔE 7.68 Nearest Tailwind class slate-700 #314158 · ΔE 3.3

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Conversions

HEX

#283d51

RGB

rgb(40, 61, 81)

HSL

hsl(209.3, 33.9%, 23.7%)

HSV / HSB

hsv(209.3, 50.6%, 31.8%)

CMYK

cmyk(50.6%, 24.7%, 0%, 68.2%)

LAB

lab(24.9, -1.95, -14.68)

LCH

lch(24.9, 14.81, 262.43)

OKLCH

oklch(35.2%, 0.0441, 248.03)

HWB

hwb(209.3, 15.7%, 68.2%)

Harmony colors

Complementary

#513c28

Analogous

#285150

#283d51

#282851

Triadic

#283d51

#51283d

#3d5128

Split-complementary

#283d51

#512828

#515028

Tetradic

#283d51

#3c2851

#513c28

#3d5128

Square

#283d51

#502851

#513c28

#285128

Shades

Color #283d51 mixed toward black.

#213343

#1b2936

#141e28

#0d141b

#070a0d

Tints

Color #283d51 mixed toward white.

#3d5e7c

#537ea8

#7d9ebf

#a8bfd4

#d4dfea

Tones

Color #283d51 mixed toward gray.

#2b3d4e

#2f3d4a

#323d47

#363d43

#393d40

Accessibility

Aa White text on this color

11.19:1

Aa Black text on this color

1.88:1

White text reads better on this background (11.19:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#32324d · ΔE 11

Deuteranopia

#312f4c · ΔE 12.2

Tritanopia

#294948 · ΔE 13.8

Achromatopsia

#3b3b3b · ΔE 11.2

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

Code

CSS

background-color: #283d51;

Tailwind (arbitrary value)

bg-[#283d51]

Related colors

Dodger Blue #1e90ff

Light Slate Gray #778899

Slate Gray #708090

Alice Blue #f0f8ff

Steel Blue #4682b4

Light Steel Blue #b0c4de

Frequently asked questions

#283d51 (#283d51) is rgb(40, 61, 81) in RGB.

No, #283d51 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 #283d51, or check how it holds up for accessibility.

Generate a palette → Check contrast