#3f366d

Color #3f366d

A muted dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 14.23 Nearest Tailwind class indigo-900 #312c85 · ΔE 7.1

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Conversions

HEX

#3f366d

RGB

rgb(63, 54, 109)

HSL

hsl(249.8, 33.7%, 32%)

HSV / HSB

hsv(249.8, 50.5%, 42.7%)

CMYK

cmyk(42.2%, 50.5%, 0%, 57.3%)

LAB

lab(26.15, 18.8, -30.77)

LCH

lch(26.15, 36.06, 301.42)

OKLCH

oklch(37.1%, 0.0919, 288.59)

HWB

hwb(249.8, 21.2%, 57.3%)

Harmony colors

Complementary

#646d36

Analogous

#36496d

#3f366d

#5b366d

Triadic

#3f366d

#6d3f36

#366d3f

Split-complementary

#3f366d

#6d5b36

#496d36

Tetradic

#3f366d

#6d3664

#646d36

#366d3f

Square

#3f366d

#6d3649

#646d36

#366d5b

Shades

Color #3f366d mixed toward black.

#352d5b

#2a2449

#201b37

#151224

#0b0912

Tints

Color #3f366d mixed toward white.

#554994

#7164b2

#958bc6

#b8b2d9

#dcd8ec

Tones

Color #3f366d mixed toward gray.

#423b69

#453f64

#48445f

#4b485b

#4f4d56

Accessibility

Aa White text on this color

10.72:1

Aa Black text on this color

1.96:1

White text reads better on this background (10.72:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3b3b63 · ΔE 4.2

Deuteranopia

#3c3c60 · ΔE 5.3

Tritanopia

#3f5a58 · ΔE 25.7

Achromatopsia

#3e3e3e · ΔE 21

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

Code

CSS

background-color: #3f366d;

Tailwind (arbitrary value)

bg-[#3f366d]

Related colors

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#3f366d (#3f366d) is rgb(63, 54, 109) in RGB.

No, #3f366d 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 #3f366d, or check how it holds up for accessibility.

Generate a palette → Check contrast