I did notice this. I noticed that when you go outside and let your eyes adjust, it looks a lot more purple than when you first turn it on.
Personally, I LOVE the Mace saber. It is my first and only (so far) and I love it the most. My cousin has an Anakin RotS and my friends have a Vader ESB and a Luke RotJ. I haven't gotten to hold or see the Luke RotJ in person so I can't judge it, but as for the Vader ESB, I liked it, but it just didn't seem as exciting as the Mace RotS to me, and I really like the Anakin RotS, but the Hilt seems so lights and the grips so small, after having the Mace for so long.