In the Bible, the rainbow is a potent symbol of God's covenant with humanity, first appearing after the flood as a sign of divine mercy and the promise never to destroy the earth by water again (Genesis 9:12-17). Dreaming of a rainbow from a biblical perspective may represent reassurance from God, the restoration of hope after a period of trial, and a reminder of God's unwavering faithfulness. It can also indicate a period of grace and renewal, suggesting that the dreamer is entering a season of peace and divine favor following hardship.

In Buddhist symbolism, the rainbow is associated with the 'rainbow body,' a state of advanced spiritual realization where the physical form dissolves into light. It also reflects the impermanent and illusory nature of all phenomena. Dreaming of a rainbow may suggest progress toward enlightenment, the dissolution of suffering, or a deepening understanding of the transient nature of reality.

Culturally, rainbows are widely regarded as symbols of hope, luck, and the promise of better times. Folklore often links rainbows to hidden treasures or magical realms, such as the pot of gold in Irish legend. In dreams, a rainbow may reflect optimism, the anticipation of reward after effort, or the bridging of differences. It can also symbolize inclusivity, diversity, and the beauty found in unity.

In Hinduism, the rainbow is often seen as Indra's bow (Indradhanush), representing divine intervention and the cessation of storms. In dreams, it may symbolize the end of conflict, the arrival of auspicious times, or the presence of celestial blessings. The rainbow can also be interpreted as a sign of spiritual alignment, indicating that the dreamer's energies or chakras are harmonizing.

Although the rainbow is not explicitly mentioned in the Qur'an or Hadith, Islamic tradition often interprets natural wonders as manifestations of Allah's mercy and creative power. In dreams, a rainbow may symbolize relief after distress, the acceptance of prayers, or the arrival of blessings. It can also reflect unity, harmony, and the beauty of Allah's creation, encouraging the dreamer to cultivate gratitude and patience during life's challenges.

From a psychological standpoint, rainbows in dreams often symbolize the emergence of hope and positivity after emotional turmoil. The rainbow's appearance following rain mirrors the integration of conflicting emotions and the resolution of inner struggles. It may also represent the pursuit of ideals, the bridging of conscious and unconscious aspects of the self, or the realization of one's full potential. Conversely, chasing a rainbow might reflect the allure of unattainable desires or escapist fantasies.

Spiritually, the rainbow is a universal archetype representing transformation, enlightenment, and the connection between the earthly and the divine. In dreams, it may signify spiritual awakening, guidance from higher realms, or affirmation that the dreamer is aligned with their spiritual purpose. The rainbow can also symbolize the harmonious blending of diverse energies within the self, or the manifestation of blessings as a result of spiritual growth.