README: add AnkiCanvasOptions

README.md

@@ -26,3 +26,45 @@ Download the premade Anki deck from the [Releases page](https://github.com/pigoz
 You can easily customize some variables picked up by AnkiCanvas. Open the card
 layout and edit the `AnkiCanvasOptions` JavaScript object in the Front and
 Back templates.
+
+
+The current default options object is the following:
+
+```html
+<script>
+window.AnkiCanvasOptions = {
+  frontCanvasSize: 300,
+  frontLineWidth: 7,
+  backCanvasSize: 150,
+  backLineWidth: 3.5,
+
+  // 'auto' is a special value that will automatically select either 'light' or
+  // 'dark' depending on Anki's "Night Mode" status. If you wish to force a
+  // colorScheme, you can pass it's name from the colorSchemes settings below.
+  colorScheme: 'auto',
+
+  // You can modify the default colorSchemes in the dictionary below, or even
+  // add your own colorSchemes beyond light and dark.
+  colorSchemes: {
+    light: {
+      brush: '#000',
+      grid: '#dcdcdc',
+      gridBg: '#fff',
+      buttonIcon: '#464646',
+      buttonBg: '#dcdcdc',
+      frontBrushColorizer: 'none', // none | spectrum | contrast
+      backBrushColorizer: 'spectrum',
+    },
+    dark: {
+      brush: '#fff',
+      grid: '#646464',
+      gridBg: '#000',
+      buttonIcon: '#000',
+      buttonBg: '#646464',
+      frontBrushColorizer: 'none',
+      backBrushColorizer: 'spectrum',
+    },
+  },
+}
+</script>
+```