Purple: Purple is any of a variety of colors with hue between red and blue. · Purple has long been associated with royalty, originally because Tyrian purple.
Gray: It is a neutral or achromatic color, meaning literally that it is "without color", because it can be composed of black and white. It is the color of a cloud-covered sky, of ash and of lead.
Yellow: "Yellow" is a song by the British rock band Coldplay. The band wrote the song and co-produced it with British record producer Ken Nelson for their debut.
Orange: An orange is a fruit of various citrus species in the family Rutaceae (see list of plants known as orange); it primarily refers to Citrus × sinensis, which is also called sweet orange.