The design of price table of pro site

Hello!
I hope you having a good day!

I will use Pro sites, and I made a price table, but I have an issue about design.

I want to change the color, which is currently black in my screenshot, but there is no option for that.
Could you let me know custom CSS for me please!
And also, I want to know how to control the font size in the price table.

Please give me a support!

King Regards
KAZUKI