Can Excel autoformatting choose the fill color automatically when I enter data in a cell?

I have a small sheet with a fair number of lines on it. When I enter a name in the first column, I would like that row to automatically fill the background color. If I entered a name that was already there, I would want to see the same color used as before. If the name has not been added to the column before, I would want a new color to be picked.

Untitled 1.xls

I know I can use conditional formatting, but entering a new format every time I entered a new name will get tedious quickly.

Maybe I could use a formula to sum all the ascii values of the letters in a name and use that for the color number?

Is this possible?