Question about MyTeam sponsor liveries

Okay so, can you change the colour of the sponsor liveries you get on MyTeam? I've currently got Seren as my title sponsor, but since my team colours are purple, white and black, I would like to know if I can change the livery to be purple, white, and black once I unlock it. 

I've just looked and the livery is already purple and white, which is great, but I would like to change the red to black. But I also feel like if I couldn't change the colours on any of the sponsor liveries, that it would be very limiting, especially since you only get three base liveries.