What Color Is Obsidian?

Obsidian is most often black: a deep, glassy black with a high natural shine. The name refers to a natural volcanic glass, and that glass is not always pure black. Some pieces are dark brown, red-brown or very dark green, and some show grey-white spots or a gold, silver or multicolored sheen. In design, "obsidian" usually names a near-black with a slight cool or warm tint rather than one fixed color.

The stone behind the color name

Obsidian forms when lava cools too quickly for crystals to grow, which leaves a smooth natural glass. Its dark color mainly comes from small amounts of minerals and impurities spread through the glass. When light passes through a thin edge, it can look smoky or slightly translucent, while thick pieces look solid black. Its glassy surface gives it strong reflections, and that sheen is a large part of why the name suggests polish and depth.

Common obsidian color variations

Variety | Typical appearance

Black obsidian | Glossy, uniform black; the most common form

Mahogany obsidian | Black mixed with reddish-brown streaks or patches

Snowflake obsidian | Black with small grey-white, flower-like spots

Sheen obsidian | Black with a gold or silver shimmer under direct light

Rainbow obsidian | Black with bands of iridescent color visible at certain angles

Green or brown obsidian | Very dark green or brown, often more visible at thin edges

What "obsidian" means as a design color

Paint makers, interface color libraries and palette generators use "obsidian" as a marketing or descriptive name, not as a standardized color. No supplied evidence identifies an official value, and different sources assign different shades to the name. The common thread is a very dark, slightly softened black. It often leans toward blue-grey, and sometimes toward brown. If a brand guide or vendor calls a color obsidian, use the exact values in that guide rather than assuming they match another source.

Using an obsidian tone in a logo palette

In a logo, an obsidian shade works as a primary dark color that feels less harsh than pure black, or as a base that lets accent colors stand out. The stone's natural variations suggest pairings: warm reds and browns from mahogany obsidian, soft greys from snowflake obsidian, or metallic gold and silver from sheen obsidian. These pairings are design interpretation, not rules attached to the color name.

• Define the shade once as a named global or spot swatch in your vector file, so every path that uses it updates together.
• Record separate values for each output: RGB or hex for screens, CMYK for process printing, and a matched spot color if the brand uses one. A dark tint on screen may print differently.
• Ask your printer whether the dark shade should print as a rich black or a single-ink black. Large solid areas and fine type have different needs.
• Test the color at small sizes and on dark backgrounds. A tinted near-black can become indistinguishable from pure black, or lose contrast against dark surfaces.
• Provide a reversed or knockout version of the logo for use on obsidian-colored backgrounds.
• Remember that the stone's reflective sheen cannot be reproduced by a flat fill. Gradients or textures that imitate it may not scale or print cleanly, so keep a flat-color master version.

Checking obsidian-themed artwork before you use it

Downloaded obsidian textures, stone effects or palette files are not necessarily editable vectors. A file with a vector extension can still contain an embedded photo of the stone or a raster preview, so open it and inspect the paths before relying on it. Permission to download such a file also does not automatically grant permission to modify it, use it in a logo or register it as part of a trademark. Check the license terms for the artwork and for any included fonts.

Gaps in the available evidence

No source material was supplied with standardized color values, brand specifications or test results for an obsidian color. This article therefore gives no hex, RGB or CMYK figures. The descriptions of the stone reflect general geological knowledge. Before you finalize a palette, confirm exact values with your chosen color system, brand guide or print vendor.