KOReader color theme patch

A user patch for KOReader that adds extended color theme control for reading:

• separate presets for UI and book content
• presets for day and night mode
• a curated set of clean light and dark presets out of the box
• create and edit your own themes directly from the settings menu

Inspired by and partially based on ideas from Euphoriyy/KOReader.patches.

Compatibility Tested on Android devices.

Preview

Built‑in presets

…or create your own theme via Add theme… in the menu.

Installation

1. Download 2-color-theme.lua.

2. Copy it to your KOReader user patches directory, for example:

   koreader/patches/2-color-theme.lua
   

3. Restart KOReader.

4. Open the settings menu — you will see a new Themes entry with extended controls.

Menus and presets

The patch adds one main entry to the settings menu:

⚙️
└── Themes
    ├── Day UI – light/dark presets for the interface in day mode
    ├── Day book – light/dark presets for book pages in day mode
    ├── Night UI – dark/light presets for the interface in night mode
    ├── Night book – dark/light presets for book pages in night mode
    ├── Add theme… – create a custom preset
    └── Restore themes to default – reset to KOReader defaults

Each of the four submenus shows the same list of presets, grouped by brightness, for example:

• Day UI – Light themes
• Day UI – Dark themes
• Night book – Dark themes
• Night book – Light themes

Usage

• Open Settings → Themes in KOReader.
• Tap one of:
  • Day UI
  • Day book
  • Night UI
  • Night book
• Tap a preset to apply it to that target.
• Long‑press a preset to edit or delete it.
• Use Add theme… to create a new custom preset.
• Use Restore themes to default to return to KOReader’s stock Default Day / Default Night behavior.

Support

If you enjoy this patch and want to support more KOReader‑related work, you can:

• star this repository on GitHub
• or buy me a coffee on Ko‑fi: