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Black

#030303 aka “Square Black” by Square

Black is a warm dark color with the hex code #030303. Also known as "Square Black" by Square . This muted hue can be represented as RGB 3, 3, 3 in digital design or CMYK 0%, 0%, 0%, 99% for print applications. Find matching Pantone color. Currently, 1 brand uses this color in their visual identity, making it a proven choice for professional branding and web design.

Black Color Values

HEX
#030303
RGB
3, 3, 3
HSL
0°, 0%, 1%
CMYK
0, 0, 0, 99

Shades & Tints

Darker Lighter

About this color

Black sits at 0° on the color wheel, placing it in the warm color family, often associated with energy and warmth. With 0% saturation and 1% lightness, this muted dark hue offers sophisticated, understated presence.

In digital design, warm colors like Black work well for calls-to-action, accent elements, and creating urgency. Dark colors provide excellent contrast for text overlays and premium brand aesthetics.

When using Black in print, the CMYK breakdown of 0%, 0%, 0%, 99% ensures accurate color reproduction. The high black component suggests this color will print deep and rich, though screen appearance may vary from print output.

Color Harmonies

Complementary

Analogous

Triadic

Split-Complementary

How to use Black

CSS Variable 

:root {
  --brand-primary: #030303;
  --brand-primary-rgb: 3, 3, 3;
}

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

Tailwind Config 

colors: {
  brand: '#030303',
}

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

Print Design (CMYK) 

C: 0%
M: 0%
Y: 0%
K: 99%

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

RGB for Screens 

rgb(3, 3, 3)
rgba(3, 3, 3, 0.8)

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

Brands using Black

1 brand uses this color in their identity

Square

Finance • In-house Square

Frequently Asked Questions

What color is #030303?
#030303 is Black, a warm dark color with RGB values of 3, 3, 3. It has a hue of 0°, 0% saturation, and 1% lightness in the HSL color space.
What is the RGB value of #030303?
The RGB color code for #030303 is rgb(3, 3, 3). This means it contains 3 red, 3 green, and 3 blue in the RGB color model.
Is Black a warm or cool color?
Black (#030303) is a warm color with a hue between 0-60° or 300-360° on the color wheel.
How do I use #030303 in CSS?
You can use #030303 in CSS with: background-color: #030303; or color: #030303; or as an RGB value: rgb(3, 3, 3). For print design, use CMYK: 0%, 0%, 0%, 99%.

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