Most often the colours of the soul is an energy that highly resonates with our inner being. I believe each soul on our planet has a colour connected to it. Just like we have a taste or desire for certain foods, styles and activities, our soul also develops a liking for certain colors.
We already know that colours deeply affect our mood and how we feel. Similarly, certain colors actually soothe our soul while other may ignite or erupt it. Different colours have different resonance and vibrations with meditation, we can also sense the vibration of cosmic energy flowing through our body.