SpecialK1985 on "[CSS] Background colour of header/footer"

Hi and apologies for the beginner question - I have tried to search, but I may be searching on the wrong terms.

I need to change the background colour of the site header and footer on this site:

http://162.13.146.61/bca

I would like to change the header/footer to black (#000000) and then update the text within to white (#FFFFFF). Unfortunately I'm just starting out and have struggled to find anything within the search. I have a new logo to go in already, but the background and the text colours need to change first.

Thank you.