Can I change the "orange" of Ubuntu?
For example, I want to change:
- the folders;
- the button highlights when you hover over them;
- the buttons too.
As far as the "highlight color situation goes, the simple way seems to be to install dconf-editor (which I use, just not for changing colors, normally)
sudo apt-get install dconf-tools
Then just search dconf-tools in the launcher
Source: How do I change the "Selected Items" color?
If you want to change the background of the launcher itself, it looks as though you're headed into some more in-depth territory, but this:
http://www.omgubuntu.co.uk/2012/02/how-to-change-unity-2d-launcher-colour-and-opacity
shows you how to do it with just a few terminal commands and two lines of code, plus some hacking of your own to figure out which color you like. Personally, I'd use HTML color codes, because you can look up some nice tables like this one:
and just sort of go with what you like.