Find inner peace with this coloring page featuring various Zen symbols, including the 'Om'. 'Om' is a sacred sound and a spiritual symbol in Hinduism, that signifies the essence of the ultimate reality, consciousness or Atman. It is a syllable that is chanted either independently or before a mantra in Hinduism, Buddhism, and Jainism. Artist : Caillou. Anti stress Coloring Pages for Adults. Just Color : Coloring Pages for Adults & Kids