The color of a soul isn’t necessarily a new idea, but it’s definitely an interesting and vivid description of the idea behind a soul. What you’ve described is also similar to a DNA strain, which is different in every person, and represented through varying colors. So there’s a cool parallel between the metaphysical and the physical, even if it was unintended.
I’m a big fan of these bouts of expression that are philosophical in nature. They usually make for good reading, and I can’t help but promote the questioning of traditional ideas.
i tried to just rate this story without leaving a comment and found out that i can’t. I like the idea of souls looking like rainbows even though the title suggests it’s the rainbows that have souls.