Issues with color scheme on checkout page

I can’t get into touch with customer service in any kind of way. I’m having issues with my check out page and the color scheme isn’t the same as the rest of the site. I know how to change it but the change won’t go through or won’t change period. PLEASE HELP!!

Yes, the options to try and fix the font and colour scheme in detail cant be done, CSS blocked. Its a terrible update and Shopify could not help us.