Design some Icons

I need an icon set for my new upcoming Linux application. I would like it to be tango style or matching with the standard GTK icons at least (look at first 4 icons in toolbar image, those are standard GTK icons (system icons) in Linux.) Icons are required to replace my really bad ones on both the toolbar and toolpalette. You must provide a portfolio where you show previous icon work to be considered. No quick rushed efforts will be accepted and to prove you can do icons in the correct style, I would like you to tackle one icon such as the RGB mode one for me to judge this. Attached is a screenshot of all the icons that will need replacing and also a folder called [login to view URL] with the current icons I created, so you know what to replace.