European citizens are not legally obliged to apply any vaccine, although they are recommended to be vaccinated against yellow fever. On the other hand, foreigners from a South American or African country considered endemic are obliged to be vaccinated against yellow fever and present the certificate endorsed by the Ministry of Health of their country of origin that demonstrates said vaccine. You have all the information in: «Tips, documentation and requirements to travel to Colombia«.
You have all the information in: "Tips, documentation and requirements to travel to Colombia".