Update readme

README.md

@@ -33,11 +33,12 @@ pcm_icon:
             fill-group-hover:     'group-hover:fill-red-800'
             stroke-group-hover: 'group-hover:stroke-red-800'
 ```
-# @TODO default options
+
+`default` - Override the default options provided to the bundle.
 
 `directories` - Which directories to look in for icons.
 
-`colours` - Custom colours to use when colouring icons. Because this extension relies on Tailwind classes for colouring we must specify all the classes. This is a bit awkward, but you can just copy this template replacing COLOUR as appropriate:
+`colours` - Custom colours to use when colouring icons. Because this extension relies on Tailwind classes for colouring we **must** explicitly list all the classes required for Tailwind to render them properly. You can just copy this template replacing COLOUR as appropriate:
 
 ```yaml
 COLOUR:
@@ -51,22 +52,13 @@ COLOUR:
 
 ## Options
 
-`icon (string)` **(REQUIRED)** Icon to use, without the `.svg` extension
+`icon (string)` **(REQUIRED)** Icon to use, without the `.svg` extension.
 
-`title (string)` Optional text to show on hover
+`title (string)` Optional text to show on hover. This can be null, but not an empty string.
 
-`size (int)` Size of the icon in pixels
+`size (int)` Size of the icon in pixels.
 
-`colour (string)` Name of the colour to use. Defaults to `primary` as it assumes you have a Tailwind colour set up called `primary`. If however you are not using `primary` to set a Tailwind primary colour in your project, you can instead set the default colour of the icon by changing what colour classes the primary colour uses. EG:
-```yaml
-primary:
-    fill:                             'fill-purple-700'
-    stroke:                         'stroke-purple-700'
-    fill-hover:                 'hover:fill-purple-700'
-    stroke-hover:             'hover:stroke-purple-700'
-    fill-group-hover:     'group-hover:fill-purple-700'
-    stroke-group-hover: 'group-hover:stroke-purple-700'
-```
+`colour (string)` Name of the colour to use. Defaults to `primary` as it assumes you have a Tailwind colour set up called `primary`. If you are not using `primary` to set a Tailwind primary colour in your project you can change the default colour in the `pcm_icon.yaml` file.
 
 `hover (string)` Name of the colour to use when the icon is hovered over