I'm using Debian Jessie, and xfce desktop environment. I find the look of tabs for other applications, such as chrome, and the file manager (thunar), and terminal (xfce4-terminal), display the active tab as a brighter color than the other tabs. The exception to this is gedit, which displays the active document as a darker tab, which is confusing when only two tabs are open. I have tried cycling through different gtk/xfce themes available using the xfce4-appearance-settings app, but this affects the tab appearance of everything except gedit! I'm using gedit 3.10.4 and xfce version 4.10.
I have tried to find the solution to this online, but I found myself going down various rabbit-holes of gnome and gtk and gtksourceview settings, which don't seem to have any useful documentation.