i am doing my own green 
skin of the editor.
I managed to change all i want exept the blue background. I am aware that the editor is based on dhtmlxToolbar so i started searching through both the editorss and toolbar;s .css files but found nothing that would change the blue background.
Could you please tell me where it is? It’s not an image i guess.
The background color can be changed in the dhtmlxToolbar_dhx_blue class (dhtmlxToolbar/codebase/skins/dhtmlxtoolbar_dhx_blue.js):
.dhtmlxToolbar_dhx_blue {
background-color: …;
…
}