Kanye West has said in interviews that he sees sounds in color and has described judging mixes by their colors, including remarks around the Yeezus and later eras about pursuing specific palettes in sound. Stage and album design across his career has leaned on saturated monochromes he has connected to how the music looks to him.
His accounts are real but thinner than the strongest self-described cases: shorter statements scattered across interviews rather than detailed walk-throughs. We place him in the self-described tier on his own words, with the note that the public record is brief.
The interest in his case is less clinical than practical: a producer whose visual presentation is famously controlled describing the sound itself as the source of the palette.