Change Header Color

Hi, I have recently installed Header Media | Photo Journal theme. Here is my website The header color for page titles or post titles is set to White by default. Since I have changed the background color of the website to be white, none of the titles are visible. Is there anyway to change the headers (h1, h2 and h3) to not being white so they can display on white background page. I have tried numerous things but I feel stuck as nothing is helping. At this point I am not sure if this is a limitation of this theme or if I need to purchase a pro version. Any help would be appreciated Thanks Ava