Oranges on any colour background mouse mat

To change the background colour: Click the blue “Personalise” button and when the text fields appear, click the blue text “Click to customise further“ to get into the design window. Somewhere on the left (near bottom) you can see the words “Background Colour” with a square next to it that shows the actual colour. When you click it, on the right side of the window the colour options will appear, and you can click one of those, or to get even more choices, click the blue text “Show Colour Picker”, then you see a coloured square and a line in rainbow colours, both have a little round handle that you can shift around until you have your favourite colour. Then click the blue “Done” button on top right and your changes will appear. You can always start over again.