Change colors on woocommerce buttons

Hello!

I previously used the woocommerce colors plugin, but this seems to be inactive. Unfortunately I changed all of my button colors there, and now I am having trouble changing them. I have gotten a lot of help here, but there is this one last field I would love to change. This in on the last page when one places orders: the box where one can choose between payment types. This one is all blue, can someone please give me some code so I can change it?

Last time I got: .woocommerce-checkout #payment {
background: #fff;
}

but the box is still blue. Thank you!!

The page I need help with: [log in to see the link]