Custom Themes

You can import a theme file from the Marketplace or create your own from a base file in desktop settings.

Quick Workflow

Open Settings → Appearance → Theme.
Either click Marketplace to download a shared theme, or click Download Base File to start from your current theme.
If you downloaded a base file, edit the JSON manually or ask an agent to customize it.
Click Import Theme and select the file.
Pick the imported theme from the theme grid.

Marketplace themes are available from the Marketplace page or the Marketplace link in Settings → Appearance → Theme.

Ask An Agent To Customize It

After downloading the base file, you can prompt an agent with something like:

Customize this Superset theme JSON to feel like a neon cyberpunk arcade.
Keep the schema valid. Preserve all required ui and terminal keys.
Return the full JSON file contents only.

Then save the returned JSON and import it in Superset.

Theme File Format

Superset accepts:

A single theme object
An array of theme objects
An object with themes: [...]

The importer supports:

id, name, type (dark or light)
ui color overrides
terminal color overrides
colors as an alias for terminal

Missing values fall back to Superset defaults for the selected theme type.

Example: Single Theme

{
  "id": "my-neon-theme",
  "name": "My Neon Theme",
  "type": "dark",
  "author": "You",
  "description": "Neon terminal and UI accents",
  "ui": {
    "background": "#12061f",
    "foreground": "#f7f5ff",
    "primary": "#39ff14",
    "accent": "#00e5ff",
    "border": "#7b2dff"
  },
  "terminal": {
    "background": "#0b0314",
    "foreground": "#f8f2ff",
    "cursor": "#39ff14",
    "red": "#ff2b70",
    "green": "#39ff14",
    "yellow": "#ffef00",
    "blue": "#00b7ff",
    "magenta": "#ff5ecf",
    "cyan": "#00ffd1",
    "white": "#e9dcff",
    "black": "#18082a",
    "brightBlack": "#6e3ea5",
    "brightRed": "#ff6fa2",
    "brightGreen": "#7dff5a",
    "brightYellow": "#fff86a",
    "brightBlue": "#59dbff",
    "brightMagenta": "#ff9be8",
    "brightCyan": "#8dffe8",
    "brightWhite": "#ffffff"
  }
}

Notes

Theme IDs must be unique and not reserved (system, built-in theme IDs like dark/light).
Very large files are rejected in the desktop importer.