At the 1952 World Fellowship of Buddhists, the flag of Buddhists was adopted as the International Buddhist Flag. The flag's six vertical bands represent the six colors of the aura which Buddhists believe emanated from the body of the Buddha when he attained Enlightenment.  

Blue (Pāli and Sanskrit: nīla): The Spirit of Universal Compassion

Yellow (Pāli and Sanskrit: pīta): The Middle Way

Red (Pāli and Sanskrit: lohitaka): The Blessings of Practice – achievement, wisdom, virtue, fortune and dignity

White (Pāli: odāta; Sanskrit: avadāta): The Purity of Dhamma – leading to liberation, timeless

Orange (Pāli: mañjeṭṭha; Sanskrit: mañjiṣṭhā - alternatively scarlet): The Wisdom of the Buddha's teachings

The sixth vertical band, on the fly, is made up of a combination of the five other colors' rectangular bands, and represents a compound of said colors in the aura's spectrum. This new, compound color is referred to as the Truth of the Buddha's teaching or Pabbhassara ('essence of light').

The Noble Eightfold Path  is an early summary of the path of Buddhist practices leading to liberation from samsara, the painful cycle of rebirth. The Eightfold Path consists of eight practices: right view, right resolve, right speech, right conduct, right livelihood, right effort, right mindfulness, and right samadhi ('meditative absorption or union').  In early Buddhism, these practices started with understanding that the body-mind works in a corrupted way (right view), followed by entering the Buddhist path of self-observance, self-restraint, and cultivating kindness and compassion; and culminating in dhyana or samadhi, which reinforces these practices for the development of the body-mind.