So I need someone’s help haha 😂 I want to make a new colour .. (OnlyFans)

So I need someone’s help haha 😂 I want to make a new colour theme! So obviously at the moment it’s orange! 

Does anyone know what app this is?? 
It’s what my old partner used to make my banner, but we don’t speak anymore haha! Anyone who can help will receive something in there messages 😏