Does anyone know if there is a way to change the colour of the customisable soft buttons for a device or activity?

I added a couple LG devices to the remote which the Philips database recognised and automatically added the 'Red, Green, Yellow, Blue' soft buttons for me - the soft buttons show up in the same colour as their name suggests.

I had to add a satellite box manually as the Prestigo did not recognise it, this device also utilises 'Red, Green, Yellow, Blue' but when I add them as soft buttons they will only show up in white.

Any clues?