Changing header from black to gradient

Which files/lines would I need to edit if I wanted the whole header to go from black (For dark) or the color used in the "light" to a gardient?

I'm looking for a sort of light blue to dark blue gradient....

any help would be most appreciated

Could You please post an url to your site?

I will gladly send you a PM with my site URL, as long as you do not provide it in the forums, I do not wish to share my URL with anyone...but I will provide it to you if it helps prove that I purchased the template

Please send me a PM with:
1. URL to your website
2. link to this thread

I need the link to check solution on working site, then it will work ootb.

I appreciate your response, but we have decided to keep the header black and went with a different logo instead

thank you!

Ok, then I'm closing the topic.