#3f3f9a

Color #3f3f9a

A moderately saturated medium blue.

Closest named color Dark Slate Blue #483d8b · ΔE 8.09 Nearest Tailwind class blue-900 #1c398e · ΔE 5.1

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Conversions

HEX

#3f3f9a

RGB

rgb(63, 63, 154)

HSL

hsl(240, 41.9%, 42.5%)

HSV / HSB

hsv(240, 59.1%, 60.4%)

CMYK

cmyk(59.1%, 59.1%, 0%, 39.6%)

LAB

lab(31.68, 27.81, -49.93)

LCH

lch(31.68, 57.15, 299.12)

OKLCH

oklch(42.2%, 0.1448, 278.22)

HWB

hwb(240, 24.7%, 39.6%)

Harmony colors

Complementary

#9a9a3f

Analogous

#3f6c9a

#3f3f9a

#6c3f9a

Triadic

#3f3f9a

#9a3f3f

#3f9a3f

Split-complementary

#3f3f9a

#9a6c3f

#6c9a3f

Tetradic

#3f3f9a

#9a3f9a

#9a9a3f

#3f9a3f

Square

#3f3f9a

#9a3f6c

#9a9a3f

#3f9a6c

Shades

Color #3f3f9a mixed toward black.

#343480

#2a2a67

#1f1f4d

#151533

#0a0a1a

Tints

Color #3f3f9a mixed toward white.

#5252b8

#7474c6

#9797d4

#babae3

#dcdcf1

Tones

Color #3f3f9a mixed toward gray.

#474792

#4e4e8b

#565683

#5d5d7c

#656574

Accessibility

Aa White text on this color

8.79:1

Aa Black text on this color

2.39:1

White text reads better on this background (8.79:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3f3f8b · ΔE 2.6

Deuteranopia

#3f3f87 · ΔE 3.3

Tritanopia

#3f7d7a · ΔE 33.2

Achromatopsia

#4b4b4b · ΔE 25.2

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

Code

CSS

background-color: #3f3f9a;

Tailwind (arbitrary value)

bg-[#3f3f9a]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#3f3f9a (#3f3f9a) is rgb(63, 63, 154) in RGB.

No, #3f3f9a 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 #3f3f9a, or check how it holds up for accessibility.

Generate a palette → Check contrast