Live preview
Interactive Obsidian workspace preview
Switch between supported modes and workspace layouts. The preview loads the theme's real CSS in an isolated Obsidian-like frame, so split panes, reading view, source editor, callouts, tables, tags, and checkboxes can inherit theme styling.
Actual CSS preview
This isolated Obsidian mock loads the theme's real CSS from its GitHub repository, so special fonts, backgrounds, callouts, tabs, and editor rules can render much closer to the installed app.
About Traffic Lights
A dark/light CSS theme for Obsidian. It has 49 GitHub stars and is steadily gaining traction in the community. As a legacy theme, Traffic Lights uses the older Obsidian CSS structure — most modern features still work, but you may want to combine it with a community CSS snippet for newer Obsidian functionality.
The theme supports both dark and light mode — switch from Settings → Appearance, and both color schemes are designed to be paired with the theme without re-tweaking. Callouts, code blocks, tables, and headings are styled to work consistently in both modes. Installation is one click — open Obsidian, go to Settings → Appearance → Themes → Browse, search for "Traffic Lights", and click Install. The theme's CSS is bundled with Obsidian's theme store, so there is no manual file copying or CSS snippet setup required.
Traffic Lights was last updated 6 years ago and currently has 4 open issues on the GitHub repo. The low issue count suggests a polished, well-maintained release.
The dark mode uses a dark gray background that the live preview on this page shows in context — callouts, blockquotes, code blocks, and the in-app navigation all reflect the theme's actual CSS. If you want to compare Traffic Lights with other themes that share the same mode support, the Similar Obsidian themes section below has the most popular alternatives ranked by GitHub stars.
Install in Obsidian
Open Obsidian and browse community themes from Appearance settings.
Settings → Appearance → Themes → Browse → Search "Traffic Lights"Frequently asked questions
- How do I install Traffic Lights in Obsidian?
- Open Obsidian and go to Settings → Appearance → Themes → Browse. Search for "Traffic Lights", click "Install" and then "Use" to activate. After install you can switch modes from Settings → Appearance.
- Does Traffic Lights support dark + light mode?
- Yes. Traffic Lights supports dark + light modes — switch between them from Settings → Appearance. Both light and dark color schemes are maintained by the theme author, so contrast, accent colors, and surface treatments are designed for each environment.
- Is Traffic Lights actively maintained?
- Traffic Lights was last updated 6 years ago. It has 49 GitHub stars. There are 4 open issues. Open the GitHub repository to follow updates, file issues, or contribute.
Similar Obsidian themes
More dark and light themes with active previews and install details.
Popular Obsidian themes
High-star community themes to compare before choosing your setup.