Theme+ for a colourful WP8.1 Start Screen keeps getting better

Theme+ is the app for you if you want a colourful Start Screen on Windows Phone 8.1.

It lets you create almost unlimited numbers of colours and geometric patters to shine through your transparent tiles.

And the developer has just released an update with more control over colours and more patterns. Transparent tiles are a new feature in Windows Phone 8.1, which is available as a Developer Preview and will go on public release soon.

v1.4
- Added new set of triangular patterns (a la low poly).
- Added nine new colors: four pastel, and five neon.
- Better performance when selecting a color.
- Huge app size reduction: from 5 MB to 90 KB.

This is an excellent app that really brings tiles to life. It's 79p/99c with a free trial in the Windows Phone Store: