If I correctly understand your question, (Please correct me if I’m wrong),
Go to: Customising ▸ General ▸ Skins and change the Primary Color per your wish.
The Logo color (Yor website name in the Header), can be changed in the
Customising ▸ Site Identity ▸ Styling menu.
If you are thinking of “Frontpage” and “Homepage”, Basically, the “Frontpage” stands for Static Page (without blog posts) and “Homepage” is the page that contains the Blog posts on it.
To clarify, I’ve adjusted Skins to light and changed the colour, and indeed that change works when I look at the viewer on the right, however, when I select “Go to the Site” (which I’m still testing and have not yet made visible publicly), the name TechniKat and the navigational locator (under the word “Home) are still orange.
I uploaded some screengrabs to try to better illustrate. These also show the two instances of “Home”.
It’s most likely you have a conflict with some of the plugins you have activated, so I suggest you check the plugins first.
Deactivate ALL plugins temporarily, then check if theme customization will start working correctly.
If this works, re-activate them individually (one-by-one)until the problem appears again on that way you can find the problematic plugin(s).
As I see you need to remove the Custom “Home” link(First one) from the Primary navigation menu.
So to do that, simply Go to Customising ▸ Menus ▸ Your Primary menu and delete the Custom “Home”link.
Thanks for these steps towards a solution. I’ve done as you suggested. And am still seeing conflict between my editing preview, where I see purple stuff and the moving circles and lines, and my site preview, where I still have orange in my name and as the navigational underlines. I think there could be issues with the Static Front Page and Home page, but I’ve been through every tab and option at this point and can’t figure out what the problem might be. I put screen grabs here if you need them https://plus.google.com/u/0/collection/YqO1dE