If you notice a strange, green hue in the Hillsborough River today, just remember you haven't seen anything yet.
The city was only testing out a bit of the coloring that will turn a large, downtown stretch of the river bright kelly green during the Mayor's River O'Green St. Patrick's Day celebration Saturday in Curtis Hixon Waterfront park.
During the event, which runs from 11 a.m. to 4 p.m., the Hillsborough River will be dyed between the Cass Street and Kennedy Boulevard bridges.
There will also be food trucks, music from the Irish band Lucid Druids, entertainment by the Tampa Gymnastic and Dance Show Stars and the Scariff Hardiman School of Irish Dance, and children's activities at the free party.
The dye used in the river is a potable variety, non-toxic and biodegradable, according to the city. The dye usually is used to trace leaks and to aid in search-and-rescue efforts in large bodies of water.