I have tried everything, tied to find currect white color of the docs in index.tpl, cart.tpl, index.php does not exist in my store after upgrade I think, tried to look up the color in content but no use.

Does anyone know how to change it? No info in my admin 'site docs' either.

colors are controlled from your css stylesheet. Look in skins/yourtemplate/styleSheets/

found it! thank you!