Should I add more N?

This one broke ground 12 days ago and growth seems to be moving along quickly now. She is in a 5 gal DWC bucket and I'm using GH Trio at about 50% strength. She is a light shade of green but I can't tell if it's because of so much new growth of if I should add more nutes. She also got her first round of nutes 24 hours ago (Day 11), so should I just wait a bit longer first?

The second photo compares day 10 to day 12.

What do you guys think?