Retroma is a CSS theme for the Obsidian note-taking application, designed to evoke a retro aesthetic inspired by arcade machines, vintage software, and early web design. The theme uses an algorithmic color system based on the modern CSS `oklch()` color space to dynamically generate palettes from a single accent color, ensuring perceptual uniformity across light and dark modes. It offers extensive customization through the Style Manager plugin, including per-note font and accent overrides, a collection of 79 styled callouts, and multiple preset configurations. The repository contains the theme manifest, preset JSON files, and example callout documentation, but the core `theme.css` file was not provided for analysis, limiting the ability to assess code quality and reusability. Based on the README and manifest, the theme appears well-designed and actively maintained, with a focus on accessibility and visual personality.