JWS,
I just finished creating a couple examples of the code you would use in the HTML Override, here is a screenshot of my end result (don't judge my color choices!):
Keep in mind, you need you are essentially using either HTML or CSS code in the SQL Override area to make use of colors, I have provided three examples below of what I used to fill in the SQL Override area for each column.
Name: '<font color="blue">' + Name + '</font>' <----(using straight HTML)
Phone: '<span style="background-color:green ; color:blue">' + Phone + '</span>' <-----(using CSS with more than one attribute)
Contact: '<span style="color:red">' + Contact + '</span>' <---(using CSS again, but only with one attribute)
I hope this helps get you started, let me know if you have any questions on this.
-Ben