#3f63b3

Color #3f63b3

A moderately saturated medium blue.

Closest named color Dark Slate Blue #483d8b · ΔE 18.25 Nearest Tailwind class sky-700 #0069a8 · ΔE 8.1

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

Conversions

HEX

#3f63b3

RGB

rgb(63, 99, 179)

HSL

hsl(221.4, 47.9%, 47.5%)

HSV / HSB

hsv(221.4, 64.8%, 70.2%)

CMYK

cmyk(64.8%, 44.7%, 0%, 29.8%)

LAB

lab(43.11, 13.26, -46.41)

LCH

lch(43.11, 48.27, 285.95)

OKLCH

oklch(51.4%, 0.1332, 264.05)

HWB

hwb(221.4, 24.7%, 29.8%)

Harmony colors

Complementary

#b38f3f

Analogous

#3f9db3

#3f63b3

#553fb3

Triadic

#3f63b3

#b33f63

#63b33f

Split-complementary

#3f63b3

#b3553f

#9db33f

Tetradic

#3f63b3

#8f3fb3

#b38f3f

#63b33f

Square

#3f63b3

#b33f9d

#b38f3f

#3fb355

Shades

Color #3f63b3 mixed toward black.

#355395

#2a4277

#20325a

#15213c

#0b111e

Tints

Color #3f63b3 mixed toward white.

#5a7bc5

#7b96d1

#9cb0dc

#bdcae8

#dee5f3

Tones

Color #3f63b3 mixed toward gray.

#4967a9

#526aa0

#5c6e96

#66728c

#6f7583

Accessibility

Aa White text on this color

5.76:1

Aa Black text on this color

3.65:1

White text reads better on this background (5.76:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#5151a4 · ΔE 8.5

Deuteranopia

#4f4ca0 · ΔE 9.9

Tritanopia

#419794 · ΔE 31.6

Achromatopsia

#666666 · ΔE 23.3

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

Code

CSS

background-color: #3f63b3;

Tailwind (arbitrary value)

bg-[#3f63b3]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#3f63b3 (#3f63b3) is rgb(63, 99, 179) in RGB.

No, #3f63b3 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #3f63b3, or check how it holds up for accessibility.

Generate a palette → Check contrast