Lyric discussion by haanaah 

Cover art for Ten Dead Dogs lyrics by Wild Sweet Orange

I honestly don't know how accurate this is because it's from a website..but I remembered that purple was used during advent for some reason or another..

Blue, the color of the sky, is symbolic of heaven. It may also be used to symbolize truth. Blue is gaining acceptance as a liturgical color for Advent.

Black is symbolic of death, and is therefore the liturgical color for Good Friday. Black can also represent sin, which results in death.

Red is the color of blood and therefore is the liturgical color for the commemoration of martyred saints. Red is used as the liturgical color for Pentecost, since it is the color of fire.

As the color of light, yellow may be used to represent divinity. However, because yellow light is not pure white, it may also be used to symbolize corruption and degradation.

Purple is the color for penitence and mourning. It is also the color of royalty. Purple is the liturgical color for the seasons of Advent and Lent.

He may have even meant for them to be in the order that they are in..in the song. Who knows!