Kundalinī Shakti (spiritual energy) has its roots in the Mūlādhāra Chakra,
Muladhara is said to be located near the basal end of the spinal column in the vicinity of the coccygeal plexus beneath the sacrum while its kshetram, or superficial activation point, is located on the perinium
The four petals are red, with the Sanskrit syllables 

वं vaṃ, शं śaṃ, षं ṣaṃ and सं saṃ written in gold upon them.