#3a5581

Color #3a5581

A muted dark blue.

Closest named color Steel Blue #4682b4 · ΔE 18.73 Nearest Tailwind class slate-600 #45556c · ΔE 5.9

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Conversions

HEX

#3a5581

RGB

rgb(58, 85, 129)

HSL

hsl(217.2, 38%, 36.7%)

HSV / HSB

hsv(217.2, 55%, 50.6%)

CMYK

cmyk(55%, 34.1%, 0%, 49.4%)

LAB

lab(35.95, 3.6, -27.84)

LCH

lch(35.95, 28.07, 277.37)

OKLCH

oklch(44.9%, 0.0798, 259.82)

HWB

hwb(217.2, 22.7%, 49.4%)

Harmony colors

Complementary

#81663a

Analogous

#3a7981

#3a5581

#433a81

Triadic

#3a5581

#813a55

#55813a

Split-complementary

#3a5581

#81433a

#79813a

Tetradic

#3a5581

#663a81

#81663a

#55813a

Square

#3a5581

#813a79

#81663a

#3a8143

Shades

Color #3a5581 mixed toward black.

#30476c

#273956

#1d2b41

#131c2b

#0a0e16

Tints

Color #3a5581 mixed toward white.

#4b6da6

#6a8abc

#90a7cd

#b5c4de

#dae2ee

Tones

Color #3a5581 mixed toward gray.

#40567b

#465875

#4c596f

#525b69

#585c64

Accessibility

Aa White text on this color

7.51:1

Aa Black text on this color

2.8:1

White text reads better on this background (7.51:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#474778 · ΔE 8.1

Deuteranopia

#464376 · ΔE 9.3

Tritanopia

#3c716f · ΔE 22.8

Achromatopsia

#555555 · ΔE 17.3

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

Code

CSS

background-color: #3a5581;

Tailwind (arbitrary value)

bg-[#3a5581]

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

#3a5581 (#3a5581) is rgb(58, 85, 129) in RGB.

No, #3a5581 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 #3a5581, or check how it holds up for accessibility.

Generate a palette → Check contrast