Like many countries in the continent, Colombia fell under the control of the Spaniards for much of its late history. In 1499, the Spaniards made Bogota, the capital of modern day Colombia, the center of a huge territory, the Viceroyalty of New Granada, also known as Gran Colombia. The territory was huge, encompassing the territories of modern-day Venezuela, Ecuador, and Panama.
After marriage, the ring is worn on the hand it had been placed on during the ceremony. By wearing rings on the fourth finger, a married couple symbolically declares their eternal love for each other. This has become a matter of tradition and etiquette. Many people wear their wedding rings day and night.
It is the same for women and men. You wear your wedding ring on the left hand, the finger next to your pinky finger. It is usually the third finger of the left hand, but there's no rule saying that it has to be that finger. In some parts of the world people wear it on their right hands, and in other parts of the world wedding rings are not worn at all.