How to use multiple font colors

Hi There,

I am pretty new to wordpress but walk against some things.

I made a black column first with white tekstcolor in the general page settings its set to white but now i added a post carousel in a white column but now my wordpress text is white also underneed the post. Can i change only that part to another color cause the newpage needs to black with white color.

And how can i add such a small bar with author and comments under the blog carousel?

you can see it on my page: https://www.voetbalschool-hilterman.nl

Thanx already