A simple Merlot is fairly purple and usually fruity--plums are the most common. They can be very complex and full-bodied, but most American merlots you will find for under $15 will be more along the lines of a simple fruit-forward expression.
Zinfandel is a big fruity wine. (zinfandel is a black grape, so it makes red wines) Syrah/shiraz is also good.
Pinot Noir is usually a nice light red, though again you can find fuller bodied ones. Good pinot is usally a little more expensive though. ($20/bottle at least)
Rose of zinfandel or pinot noir would be good choices too, though they'll be pink and not red. Rose wines very often express strawberry flavors.
Why the obsession with color? Who cares what color it is, if she likes the taste?
Anyway, I would suggest you go get a bottle of Australian Shiraz (or, if you feel bold, a Shiraz/Cabernet blend). The Australian versions of these are usually nice, soft, and fruity. Easy to drink, widely available, and inexpensive. Any brand will probably do, though I tend to be wary of those that are less than $5/bottle. Spend $10-15 and you'll be good to go. Most wines from big producers in the central valley of CA will be of similar style (easy, soft, fruity).