Changing Multiple Choice Question Colours

Hi,

I'm relatively new to Articulate Storyline and I'm building my first course. I'm happy with customising the colours for most sections. However, I can't work out how to change (or if it's even possible) the colours of the radio button and also the hover highlight in questions.

Currently the default is:

Hovered Answer = Light Blue/Sky Blue

Radio Button Selected = Blue

Is it possible to change these as they don't match my company's Branding.

Thanks in advance.

SCB