Theme Color Change

Hello,

I am using the Williamson theme. I want to change the default colors. Currently, the links are red. I want them to be purple. I have gone to the customize tab and changed the colors of the color scheme. In that window, the colors have been changed. When you go to the actual website, the colors are still red. I don’t know what is preventing the colors from updating. If someone could help me, that would be great.

The page I need help with: [log in to see the link]