Frogspawn Color

[brizzo]

I have a 'brown' branching frogspawn that I've had for about 7 months now. In the last few days some tentacles have started to turn green from brown; going green to brown, from bottom to top. All tips are pink.

Last month when I upgraded from pc to mh, I rushed the light acclimation and had a small ammonia spike, which affected the health of everything in my tank.....

Would this color change be part of the healing/growing process, or having upgraded lighting? The frogspawn flourished under the PC lighting (always fully extended, grew 3 more polyps) I got the frogspawn from reefkeepers, and in their tank it showed noooo sign of green then