According to Wookieepedia Revan's New Lightsaber was blue when first buillt during KotOR 1, then in the book Revan he changed it to green, then in TOR he changed it for the last time to purple
I love you too, with all of my heart.
Your aren't afraid to love any more?
After this? No. Nothing could make me feel safer than to be loved by you.
-Bastila Shan and Revan