After plugin activation text color, font changes etc, even tho I removed content of ougcawards_css.

Hi, I apologyze for the delay.

Are you sure you did follow the instructions in the following FAQ?
https://ougc.network/entry?custom-theme-css-or-style-changes-or-is-disturbed-after-plugin-activation

This is the only CSS code the plugin adds globally, there should be nothing else affecting your forum if you followed the instructions for your custom theme.

Regards.