Phosphor

by johanviberg
Screenshot of the Phosphor Obsidian theme
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Description

This theme supports Dark Mode
This theme supports Light Mode

README file from

Github

Phosphor

An Obsidian theme for deep-focus writing and reading.

Named for the soft, persistent glow of phosphorescent ink — text that lingers in the mind after the page goes dark.

Phosphor dark and light modes

Phosphor light and dark modes

Features

  • Spectral arc headings — warm amber (H1) through cool sage (H6), mirroring natural reading energy
  • Tuned for long-form reading — 18px base, 1.72 line-height, ~68ch measure, perfect fourth type scale
  • Dark and light modes — both built around the same warm-to-cool palette
  • 20+ custom checkboxes — icons for tasks like [!] important, [?] question, [/] in-progress, [I] idea, [b] bookmark, [P] PR open, [M] PR merged, and more
  • Pure CSS — no build tools, no dependencies, just theme.css

Typography

Element Font
Body Source Serif 4
Interface Inter
Code JetBrains Mono

Install

Settings > Appearance > Themes > search Phosphor > Install and use

Author

@jviberg