Changing colour of the title of a category page

Hi. My website is mbwoodcraft and I am trying to make a blog on the page called #At work. At the moment the page is set up as a category so that we can update the page with new posts. I would like the page to either be without a title, or if that is not possible I would like it to just be called #At work and be this green #9DB668 rather than the horrible bright one that you can see at the moment.

Any help would be very much appreciated.

Sorry about my lack of knowledge.

Anita