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Is a rainbow good or bad luck?

Is a rainbow good or bad luck?

Rainbows have long been associated with both good and bad luck in cultures around the world. Some view rainbows as a positive omen, a sign of prosperity or a symbol of hope. Others consider them an ill omen, associated with death and misfortune. So which is it – is a rainbow ultimately good or bad luck? Let’s explore the history, mythology, and superstitions around rainbows to try to answer this question.

Good Luck Associations

In many cultures, rainbows are seen as symbols of good fortune:

Symbol of Hope

Rainbows can represent hope, light after the darkness, and overcoming adversity. They appear after storms and rain, showing the sun breaking through again. This has given them an uplifting, optimistic meaning. Ancient Greek and Roman mythology portrayed the rainbow as a message from the gods after storms. In the Bible’s story of Noah’s Ark, the rainbow symbolized God’s promise to never again flood the earth.

Connection to Gods

Some mythologies and folklore link rainbows to benevolent gods and deities. In Hinduism, the rainbow is called Indra’s Bow, associated with Indra, the god of rain and thunder. According to Chinese legend, the rainbow is a slit in the sky temporarily patched by the goddess Nüwa with stones of five different colors. These stories present rainbows as part of divine powers and protection.

Good Fortune and Luck

In the modern world, rainbows are still seen as heralds of luck, fortune, and wishes coming true in many cultures. In Ireland, they say a pot of gold can be found at the end of a rainbow, bringing wealth and prosperity. Some believe that anything wished upon when seeing a rainbow will come true. Rainbows are often used as symbols of creativity, inspiration, and imagination.

Positive Energy

New Age and metaphysical thinking connects the rainbow’s colors and light to positive energy and chakras. Each color corresponds to a different chakra point and can help stimulate and balance energy flow in the body. Rainbow meditation, healing, and visualizations use this chromotherapy for renewal. Overall, rainbows are tied to uplifting, cheerful associations.

Bad Luck Associations

However, rainbows have also been linked to some negative superstitions and been viewed as ill omens:

Death and the Afterlife

In some cultures, rainbows are seen as bridges between life and the afterlife. Hawaiian mythology presents the rainbow as the path traveled by gods and souls to the heavens. Similarly, ancient myths in Patagonia depicted the rainbow as a route of dead souls. These grim associations connect the rainbow to death.


There is a superstition in parts of Europe that seeing a rainbow to the south will bring bad luck. This is connected to weather patterns in the region, as southern rainbows tend to precede storms blowing in from that direction. Rainbows have also traditionally been seen as omens of coming hardships, tribulations, and challenges ahead. They were not always viewed as positive harbingers.


Since rainbows quickly appear and vanish, some view them as a sign of uncertainty, unpredictability, and changeability. Their fleeting nature makes them an unstable omen, not necessarily indicating steady good or bad fortune ahead. This unpredictability itself can be seen as a sign of potential trouble brewing.

Pagan Associations

Earlier pagan traditions in the British Isles before Christianity viewed the rainbow as a bad omen associated with meddling supernatural beings. The transient rainbow was evidence of the tricks and spells cast by mischievous fairies, ghosts, or witches. Its appearance was a sign these pagan spirits were active and up to no good.

Scientific Explanation

Science provides an explanation of the rainbow’s creation without supernatural associations. Here is a brief overview:

How Rainbows Form

Rainbows are optical phenomena created by the refraction, reflection, and dispersion of sunlight through water droplets. When sunlight enters a raindrop, it slows down and separates into its different wavelengths or colors. These bounce around internally, reflect off the back of the drop, and fan out at a range of angles.

Angle of the Sun

Rainbows only form when the sun is at an angle of 40-42 degrees relative to the viewer’s line of sight. The light must be able to refract and reflect off the raindrops at this exact angle to create the rainbow effect.

Colors and Shape

The colors of the rainbow arise from the different wavelengths of visible light. Red has the longest wavelength while violet has the shortest. The sequence of colors is always ordered ROYGBIV – red, orange, yellow, green, blue, indigo, violet. The round arch shape results from the wide angular dispersion of light.

Color Wavelength (nm)
Red 620-750
Orange 590-620
Yellow 570-590
Green 495-570
Blue 450-495
Indigo 445-450
Violet 380-445

So in reality, the rainbow is simply an optical effect caused by sunlight and raindrops – nothing supernatural at all!


So is a rainbow ultimately good or bad luck? There are reasonable associations on both sides, given rainbows’ mythological and folkloric history. Different cultures have interpreted the rainbow according to their own traditions – as a bridge to the gods, a path for the dead, a trickster spirit, or a message of fortune.

From a logical standpoint, rainbows do not actually affect luck or change events themselves. They are natural optical phenomena without any supernatural powers. However, they remain powerful and uplifting symbolic images. Seeing a rainbow can brighten your mood and feel like a stroke of good luck in the moment. But it does not necessarily foretell your future fortunes either way. Ultimately, perhaps the rainbow’s luck can be what you interpret it to be.


– Rainbows have been seen as both good and bad omens across history and cultures
– Positive associations include hope, gods, wishes, prosperity, and creativity
– Negative links include death, misfortune, unpredictability, and pagan spirits
– Science shows rainbows are optical light effects without supernatural influence
– Rainbows may bring a sense of luck through symbolic meaning and optimism
– But they do not necessarily predict future events or fortunes by themselves

So while rainbows are powerful symbols, their luck may lie more in your perspective than any magical force. Their beauty can uplift the spirit and seemingly bring fortune in the moment. But on the whole, rainbows likely have neither inherently good nor bad luck attached to them – their meaning is what we make of it.