Steps to reproduce the issue

Make actions to display any message containing "_QQ_"red"_QQ_", e.g., change site language.

Expected result

The "Warning!" word is displayed in red color as stated in the source code using class="red".

Actual result

The "Warning!" word is displayed in green color (no color contrast to the text around).

System information (as much as possible)

Joomla 3.9.2

Additional comments

I think no class red is defined in template.css.