Trimurti form of Shiva represents Shiva is one of His three
aspects – creator, sustainer or destroyer. The manifests aspect of Shiva
include – Sadasiva murti, Pancha Brahma, Maheshwara Murti, Ekadasa Rudras and
Vidyesvaras. Vidyesvaras are beings through whom the lower order of beings
should attain higher evolutionary stages. They are eight in number and have
different colors. Trimurti is one of the them and the color is crimson.
Each face of the Trimurti form of Shiva should have one face
set with three eyes and adorned with jatamakuta (matted hair), yajnopavita
(sacred thread) and all other ornaments.
According to Purva Karanagama, Trimurti should carry weapons
in their hands and keep their front ones in the varada (benefactor) and abhaya
(protector) poses.
But Vishnu Dharmottara states that the front hands of
Trimurti should be kept in anjali pose, and the back ones should carry the bana
and trishula.