Unmattha Bhairava’s system is yellow in coloration and he rides with a horse. This form of Bhairav is said to become of serene character and by worshiping him, somebody receives rid of all his destructive views and he feels quiet and happy. From the Kala Bhairav Ashtakam by Adi Shankracharya, https://baglamukhi09764.ltfblog.com/29395257/the-basic-principles-of-bhairav