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+# Introduction
+
+This page contains the necessary information to get started developing custom themes for qBittorrent. They are supported since version 4.2.2.
+
+# What are .qbttheme files?
+
+These are theme bundles for qBittorrent.
+They should contain all files required to support theming in qBittorrent and are packed using [Qt's Resource Compiler](https://doc.qt.io/qt-5/rcc.html).
+qBittorrent accesses files inside `.qbttheme` using [Qt's Resource System](https://doc.qt.io/qt-5/resources.html).
+Currently, qBittorrent only searches for a `stylesheet.qss` file inside a `.qbttheme` file.
+
+# How to create your own theme bundles?
+
+You can check out this Python script([here](https://github.com/jagannatharjun/qbt-theme/blob/master/Builds/make-resource.py)) for the easy creation of `.qbttheme` files.
+
+At runtime, qBittorrent loads the `stylesheet.qss` file to support theming. `stylesheet.qss` is a [Qt stylesheet](https://doc.qt.io/qt-5/stylesheet.html), which is basically custom CSS for Qt.
+You can read more about Qt stylesheet syntax [here](https://doc.qt.io/Qt-5/stylesheet-syntax.html). A reference is also available [here](https://doc.qt.io/qt-5/stylesheet.html).
+qBittorrent mounts the `.qbttheme` file under the `:uitheme` prefix, so every file should be referenced accordingly inside `stylesheet.qss`.
+
+# Examples
+
+- To change Transfer List row colors based on the torrent state, one can add the following to their `stylesheet.qss`.
+
+```css
+TransferListWidget 
+{
+  qproperty-downloadingStateForeground: limegreen;
+  qproperty-forcedDownloadingStateForeground: limegreen;
+  qproperty-downloadingMetadataStateForeground: limegreen;
+  qproperty-allocatingStateForeground: #cccccc;
+  qproperty-stalledDownloadingStateForeground: #cccccc;
+  qproperty-stalledUploadingStateForeground: #cccccc;
+  qproperty-uploadingStateForeground: #63b8ff;
+  qproperty-forcedUploadingStateForeground: #63b8ff;
+  qproperty-pausedDownloadingStateForeground: #fa8090;
+  qproperty-pausedUploadingStateForeground: #4f94cd;
+  qproperty-errorStateForeground: red;
+  qproperty-missingFilesStateForeground: red;
+  qproperty-queuedDownloadingStateForeground: #00cdcd;
+  qproperty-queuedUploadingStateForeground: #00cdcd;
+  qproperty-checkingDownloadingStateForeground: #00cdcd;
+  qproperty-checkingUploadingStateForeground: #00cdcd;
+  qproperty-checkingResumeDataStateForeground: #00cdcd;
+  qproperty-movingStateForeground: #00cdcd;
+  qproperty-unknownStateForeground: red; 
+}
+```