So I was watching ROTS again and I noticed how the blue lightsabers look very dark, not like in TPM, AOTC or even in the OT.

Maybe it's because those digital sets were pretty dark, but if you look at the promotional pictures you can see that they are very different than they were in the movie -

And this is a shot form the movie -

It's not a big issue for me, except that in ROTS they look a bit cartoon'ish. It would be cool to have a constant color throughout the series.

But what do you guys think? And, most importantly, what are Bob's thoughts about this?