#283c57

Color #283c57

A muted dark blue.

Closest named color Charcoal #36454f · ΔE 11.99 Nearest Tailwind class slate-700 #314158 · ΔE 2.3

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Conversions

HEX

#283c57

RGB

rgb(40, 60, 87)

HSL

hsl(214.5, 37%, 24.9%)

HSV / HSB

hsv(214.5, 54%, 34.1%)

CMYK

cmyk(54%, 31%, 0%, 65.9%)

LAB

lab(24.86, 0.79, -18.68)

LCH

lch(24.86, 18.7, 272.42)

OKLCH

oklch(35.2%, 0.054, 256.17)

HWB

hwb(214.5, 15.7%, 65.9%)

Harmony colors

Complementary

#574328

Analogous

#285357

#283c57

#2c2857

Triadic

#283c57

#57283c

#3c5728

Split-complementary

#283c57

#572c28

#535728

Tetradic

#283c57

#432857

#574328

#3c5728

Square

#283c57

#572853

#574328

#28572c

Shades

Color #283c57 mixed toward black.

#213248

#1b283a

#141e2b

#0d141d

#070a0e

Tints

Color #283c57 mixed toward white.

#3c5a83

#5078ae

#7c9ac3

#a8bcd7

#d3ddeb

Tones

Color #283c57 mixed toward gray.

#2c3d53

#303d4f

#343e4b

#383e47

#3c3f43

Accessibility

Aa White text on this color

11.2:1

Aa Black text on this color

1.87:1

White text reads better on this background (11.2:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#323251 · ΔE 8.5

Deuteranopia

#312f50 · ΔE 9.5

Tritanopia

#294d4c · ΔE 17.6

Achromatopsia

#3b3b3b · ΔE 13.2

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

Code

CSS

background-color: #283c57;

Tailwind (arbitrary value)

bg-[#283c57]

Related colors

Light Steel Blue #b0c4de

Cornflower Blue #6495ed

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Frequently asked questions

#283c57 (#283c57) is rgb(40, 60, 87) in RGB.

No, #283c57 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 #283c57, or check how it holds up for accessibility.

Generate a palette → Check contrast