They look whitish yellow to me dude. I don't want to freak you out but your plant seems kind of spindly in the pic but I am just a newb also. This plant in the pic in this reply will be finishing second week flower in a few days and I noticed today the tips of flower are turning brownish which does not sound right to me. (outside gro) Ill post a pic so you can compare to yours. Clouds, rain and wind last few days. Average 80 to 90 and same for humidity.
Hold on, I just looked at your pic again. I see what you are talking about. Looks like mine on top on the tips are starting to do the same thing at almost 2 week flower (10 weeks total grow) and it's way too early.
Ps- I did tons of research and read the whole grow bible in one night. There is a LOT of crazy bullshit info out there coming from stoned teenagers so you have to figure out what's real and what's not. Half of these dude's write like they dropped out in 5th grade. This plant took over my whole life. I don't even get stoned or chase women anymore.