visa for europe

No visa required for Colombian citizens visiting the UK.

It looks like you will need a Schengen Visa. Again, as stated before, you should contact the visa of the country you will be visiting or the country you will first be entering in the Schengen area.

Kate

Your green card is completely irrelevant here. Your nationality is what counts. And citizens of Colombia do need to apply for a Schengen visa I'm afraid. As a matter of fact you should apply for it at the country where you intent to enter the Schengen zone. http://www.eurovisa.info

Andreas is right that your nationality is what counts when visiting other countries (I hold a US green card and Mexican passport). But the green card is NOT totally irrelevant - you need it to get back into the US along with your passpport. So don't leave home without it!