Since this is technical writing, the concise nature of tables is appropriate and may make the information easier to scan quickly. You could try something like:
Vary your shirt color to achieve different goals according to the table below:
Goal | Shirt color
==============================
Appear offensive | Red
Look fresh | White
Express doubt | Green
Hide dirt | Black
The table structureformat helps to enforce parallel structure. It reduces redundancy in the use of "one," but also avoids repetition of the introductory, "If you want to..." and of the verb "wear..."