How a song turns into colors
The key sets the base color: songs in a major key lean to warm, bright colors, and minor keys to blues, violets and magentas. The tempo spreads the colors apart: the faster, the more contrast. The energy (speed, beats and brightness of the sound) decides whether the colors are soft or vivid, and the bass gives the darkest color.
What it is good for
Make a playlist cover, pick colors for a video or a post about a song, or just find out what color your favorite song is and share it.