Smalt

Q: How do I use #3F3399 in CSS?

You can use #3F3399 in CSS with: background-color: #3F3399; or color: #3F3399; or as an RGB value: rgb(63, 51, 153). For print design, use CMYK: 59%, 67%, 0%, 40%.

#3F3399

Smalt is a cool medium color with the hex code #3F3399. This moderately saturated hue can be represented as RGB 63, 51, 153 in digital design or CMYK 59%, 67%, 0%, 40% for print applications. Find matching Pantone color.

Smalt color values

HEX: #3F3399
RGB: 63, 51, 153
HSL: 247°, 50%, 40%
CMYK: 59, 67, 0, 40

Shades & tints

Darker Lighter

About this color

Smalt sits at 247° on the color wheel with 50% saturation and 40% lightness, placing it in the blue segment of the spectrum. The moderate 50% saturation gives it enough color presence to register clearly without competing for dominance in a composition. Its mid-range lightness positions it as a mid-tone: neither a background color nor a deep accent, but something in between.

In digital environments, Smalt is rendered as rgb(63, 51, 153), where the blue channel is highest at 153, producing a strongly blue character. This cool mid-tone is a reliable choice for UI chrome, informational states, and contexts that call for a calm, readable presence.

For print, Smalt translates to a CMYK breakdown of 59C 67M 0Y 40K. With a moderate key (40%), this color uses black to deepen the chromatic channels rather than replace them, a profile that typically holds up well in both offset and digital print. No brands in the brandkit.pro library currently specify this exact hex as a named brand color.

Color harmonies

Complementary

Analogous

Triadic

Split-Complementary

How to use Smalt

CSS Variable

:root {
  --brand-primary: #3F3399;
  --brand-primary-rgb: 63, 51, 153;
}

Define as a CSS custom property for consistent theming across your site.

Tailwind Config

colors: {
  brand: '#3F3399',
}

Add to your Tailwind config to use classes like bg-brand.

Print Design (CMYK)

C: 59%
M: 67%
Y: 0%
K: 40%

Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.

RGB for Screens

rgb(63, 51, 153)
rgba(63, 51, 153, 0.8)

Use RGB notation for compatibility or add alpha channel for transparency.

Brands using similar hue

17 brand s with colors near 247° on the color wheel

Frequently asked questions

What color is #3F3399?

#3F3399 is Smalt, a cool medium color with RGB values of 63, 51, 153. It has a hue of 247°, 50% saturation, and 40% lightness in the HSL color space.

What is the RGB value of #3F3399?

The RGB color code for #3F3399 is rgb(63, 51, 153). This means it contains 63 red, 51 green, and 153 blue in the RGB color model.

Is Smalt a warm or cool color?

Smalt (#3F3399) is a cool color with a hue between 120-300° on the color wheel.

How do I use #3F3399 in CSS?

You can use #3F3399 in CSS with: background-color: #3F3399; or color: #3F3399; or as an RGB value: rgb(63, 51, 153). For print design, use CMYK: 59%, 67%, 0%, 40%.