Why were the color meanings on the Mexican flag changed?

The color meanings on the Mexican flag were changed in the early 19th century to reflect the values of the newly independent nation. Originally, the colors represented Catholicism (green), the Spanish monarchy (white), and the indigenous people (red). After independence, the meanings were redefined to symbolize hope (green), purity (white), and the blood of national heroes (red), aligning with the ideals of democracy and nationalism. This shift helped to unify the nation under a new identity post-colonization.