#373f6f

Color #373f6f

A muted dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 20.04 Nearest Tailwind class blue-900 #1c398e · ΔE 7.4

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#373f6f

RGB

rgb(55, 63, 111)

HSL

hsl(231.4, 33.7%, 32.5%)

HSV / HSB

hsv(231.4, 50.5%, 43.5%)

CMYK

cmyk(50.5%, 43.2%, 0%, 56.5%)

LAB

lab(28.15, 11.19, -28.91)

LCH

lch(28.15, 31, 291.16)

OKLCH

oklch(38.5%, 0.0821, 274.75)

HWB

hwb(231.4, 21.6%, 56.5%)

Harmony colors

Complementary

#6f6737

Analogous

#375b6f

#373f6f

#4b376f

Triadic

#373f6f

#6f373f

#3f6f37

Split-complementary

#373f6f

#6f4b37

#5b6f37

Tetradic

#373f6f

#67376f

#6f6737

#3f6f37

Square

#373f6f

#6f375b

#6f6737

#376f4b

Shades

Color #373f6f mixed toward black.

#2e345c

#252a4a

#1b1f37

#121525

#090a12

Tints

Color #373f6f mixed toward white.

#4a5595

#6671b3

#8c94c6

#b2b8d9

#d9dbec

Tones

Color #373f6f mixed toward gray.

#3c426a

#404665

#454961

#4a4c5c

#4e5058

Accessibility

Aa White text on this color

9.99:1

Aa Black text on this color

2.1:1

White text reads better on this background (9.99:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3b3b66 · ΔE 3

Deuteranopia

#3a3a64 · ΔE 3.3

Tritanopia

#375e5c · ΔE 25

Achromatopsia

#424242 · ΔE 18.9

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

Code

CSS

background-color: #373f6f;

Tailwind (arbitrary value)

bg-[#373f6f]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#373f6f (#373f6f) is rgb(55, 63, 111) in RGB.

No, #373f6f 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 #373f6f, or check how it holds up for accessibility.

Generate a palette → Check contrast