The use of the color red in the church during Pentecost is commonly attributed to its association with the flames of the Holy Spirit, which descended upon the apostles and other followers of Jesus Christ as tongues of fire. Red, as the color of fire and blood, is a natural choice to represent this element. The imagery of flames and fire is often associated with the Holy Spirit in Christian iconography, and red serves as a powerful visual reminder of the transformative power of faith.