For you primary and secondary text colors, try looking in framework in the res/colors folder. Should be labeled something like tw_primary_text_dark.xml and tw_secondary_text_dark.xml. Not sure if that's the exact names without looking, but it pretty close. You can also change a lot of your button text, spinner text in the same folder, just look at the different xmls. The text you have highlighted should be the first one I mentioned up above. Tw_primary_text_dark. Hope that helps you out some.
There are still other colors you may want to edit the res/values/colors and res/values/styles but the main text your looking for is in res/colors.
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