You could go for rotala macranda...that's kinda pinky goldy red, and if your light isn't quite bright enough it just stays a kinda goldy green.
though apart from lots of light, red plants also need a lot of iron and really thrive with CO2.
Or if you want heaps of colour maybe go for the artificial, neon blue silk milfoil on TM :lol: :roll:
Or you could get some crypts, go for the nice rich earthy colours , and they're low light as well.