A featured tag about rainbows could be "Spect

Rainbows are beautiful optical phenomena that occur when sunlight is refracted, dispersed, and reflected by water droplets in the atmosphere, typically after rainfall. They form a spectrum of colors, with red on the outer edge and violet on the inner edge. The mnemonic "ROYGBIV" helps remember the sequence of colors: red, orange, yellow, green, blue, indigo, and violet.