Here's how I just changed my text color on the tabs: [Object Dock Plus /XP SP2/ currently using Kali tab 1] But I've done it on other styles also.
First get the RGB numbers of the color you want to use, I use a color picker
(pixie) I wanted to change from black 0 0 0 to a blue 37 124 244.
Then I opened the docks configuration window and doubled checked which tab theme I was using.
Went to C:\Program Files\Stardock\ObjectDock\Backgrounds\Tabbed opened the KaliTab1 folder and then opened the background.ini file (right click and choose to open as text or -open with- notepad) went to the text color entry and changed it, saved the notepad & closed it, closed and re-opened ObjectDock and there's my blue text.
Robert