Unable to change kendos tabstrip text color

I have been working on angular with kendos library for some time now. I have recently made a modal which contains tabs. Contents in the tabs are served as required but the thing is I am unable to change the text color of the tab heading. The text have default red color. I have tried many things like tried to give styles, added [ngClass] directive.But nothing worked for me. I have looked onto the docs but couldn't get anything.

Please help

Thanks in advance