Muladhara

A red four-petaled lotus four petals bearing the Sanskrit letters va, scha, sha and sa. The central lam is surrounded by a yellow square.
The Muladhara chakra has four petals bearing the Sanskrit letters va, scha, sha and sa. The center syllable is lam. The tattva of Earth is represented by a yellow square.
Muladhara Chakra (मूलाधार चक्र)

Muladhara (Sanskrit: मूलाधार or मूलाधारा; IAST: Mūlādhāra, lit. "root of Existence." Mula means root and dhara means flux.) or the root chakra is one of the seven primary chakras according to Hindu tantrism. It is symbolized by a lotus with four petals and the colour pink or red.