Yeah, it some kind of Coral Snake (Micrurus sp.). Colombia has tons of Coral Snakes though, so I couldn't tell you what species it is. They are highly venomous, but generally do not pose much of a threat to humans due to their very secretive nature. That said, when you do find one, do not attempt to handle it!
You might want to try http://www.snakesofcolombia.com to see of you can narrow it down to a certain species.
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- Natalie
(San Francisco Bay Area)
1.0.0 Banded California King
1.0.0 Mexican Black King
0.0.1 Goini Kingsnake
1.0.0 Bay of LA Rosy Boa
0.0.1 Kenyan Sand Boa
1.2.0 Rubber Boas