They are very similar in shading in 'real life', but if you get some Magenta and figure out how to grow it, write back and let me know how you did it.
I've been battling this plant for months with little luck under 4watts/gal. and CO2 at 25ppm.
Sometimes you just have to realize that you can't grow certain plants, move on, and cut your losses. I think I'm at that point now.