hey everyone it's my first time growing and I almost 3 weeks in to flower and noticed the the pistol hairs are starting to turn orange.

I was wondering If this is normal this early. or is there something going on. I'm in soil. water ph is 6.5 to 6.7. run off is 6.6. the 2 strains are dr who and northern light crossed with skunk. temp is 73 to 75 degrees f. humidity is 45 to 50