Changing Page Header Colors

I’m using the Lifestyle Minimalist WordPress theme, version 0.2.0. All of the pages headers are black with the exception of the blog page’s header which is red. I’d like for all of the page headers to be red. I’ve sent several messages to the themes developer but I haven’t received any response. As a matter of fact I haven’t seen any posts since July 2016. Can anyone instruct me how to make this change? Thanks lperruso11@gmail.com