When Holi first began, certain colors had meaning. Red-Purity, Green-Vitality, Yellow- Pious feeling, Blue- calmness and sedateness. But as time went on, more colors are involved, but have less of a meaning to certain people.
Culture teaches us values and beliefs. There are so many cultures in our world. That is what makes our world so interesting. I love to learn about other cultures because you see how different people are, even how similar they are.