If she's quite perky, eating/drinking, moving about, not having trouble breathing, etc. etc., then you may want to consider observing her for a while longer.She is just beautiful except for the belly. Bright red comb. Shiny feathers.Eating. Running. Do you think aspirin water might give her any relief?
That's up to you, if you feel she's in pain and fluid needs to be drained.
I would not offer any aspirin.
The fluid can be anywhere from a clear color to dark, it depends on what condition is causing the fluid. The links below @TwoCrows has a great post on draining, the next post she hits on color of the fluid.
https://www.backyardchickens.com/threads/sick-chicken-with-big-belly.1204480/post-19098770
https://www.backyardchickens.com/threads/sick-chicken-with-big-belly.1204480/post-19098784