Colored contacts?

where is the best place
to get them and what is the best brand when going from dark brown eyes to blue
eyes?
You must firt go to your optometrist and get a written perscription for the
contact since they are a medical device. No place, not even online, will sell
you contacts if you do not have a doctor's perscription. (It's the law)

Second off, from personal experience I've found that it's EXTREMLY difficult to
wear color contacts with dark brown eyes. The one that worked the best for me
was Acuvue 2 Deep Saphire. However, it depends on what lens your optometrist
perscribes.
Best place to get your contact is an Optometrists or licensed Optician.

Best brand from going from dark brown eyes to blue i would say Freshlook
Colourblends.