Holi is celebrated as a Hindu festival to mark the arrival of spring, celebrate the divine love between Radha and Krishna, and commemorate the triumph of good over evil, often symbolized by the story of Lord Vishnu defeating the demon Hiranyakashipu; essentially, it's a joyous festival of colors, love, and new beginnings. 

Key points about Holi:

Spring Festival:

Holi signifies the end of winter and the beginning of spring, bringing new life and hope. 

Krishna and Radha:

A prominent legend associated with Holi is the story of Lord Krishna playfully applying colors on Radha, symbolizing their deep love. 

Mythological Story:

The festival also commemorates the victory of Lord Vishnu (as Narasimha) over the evil demon Hiranyakashipu, where his devotee Prahlad was saved from his aunt Holika. 

Celebration with Colors:

The main aspect of Holi is the playful throwing of colored powder (gulal) and water on each other, representing joy and unity.