Mastery rank test area Colours

[PlatinumArcher]

Is there any way to change the colours of the mastery rank test area? I see video upon video of people doing it with orange background and black platforms. For me, I have white background and white platforms. It's honestly just me jumping in random directions hoping i hit a platform and exceedingly stupid to rank up this way. Am I missing somthing? Where can I change the colours of the testing area?

[Beggining]

Those are the old colours.

It'd be nice if we have a clearer contrast between the platform and the background like that, though.