New to Trisquel :)

I have a problem with the sound too, but somehow, it's less intrusive and well, if I changed it, what would I replace it with.

I have managed to remove the Trisquel Logo, got the Minimize and Maximize button to appear but they are not in the order I want them in and I still havin't found how to change the color of them :(
I also want to add a color to the scroll up/down thingy and change the color of when we select a repertory from the "Places" on the side and change it's background color too. I also would like the grey of my windows to be a little lighter. Is there an app to edit the colors ?

But over all Trisquel is looking really good :D ! Thanks guys :) !

Creating my own theme would be nice, but, I am afraid it will just be to completcated for me and I have other priorities for now.
I just need to tweak a few colors and everything will look nicely, It stills looks quite oppresive for now.
I have already used dconf to make the minimize and maximize buttons appear but I do not find where to change the design. Make them smaller, bigger, closer together, further appart ? The path I am looking at is dcon -> org -> gnome -> desktop -> wm -> preferences and **** -> desktop -> interface as you have mentioned but haven't noticed anything :(

I have tried uck as a test for the future and did not expect so many errors, I got the usuable gfxboot error and now a theme parsing error, what does all that mean ? Am I missing dependencies, isn't it supposed to just work ? Strange peice of software..