Chopin's music always sounds like Chopin's music. Had he lived in the 21st Century, I wonder if he would have a propensity for dark background on web pages.
I associate major keys with lighter colors and minor keys with darker colors, and keys with many flats/sharps with darker colors than keys with few accidentals. I'm particularly enamored with Chopin's music that's in C# minor and Bb minor. I can't explain why.
On the other hand, I also enjoy tunes in F minor and Dorian mode. My color associations with Greek modes roughly follow their parallel major keys.
Table of major keys:
|G major||grass green|
|D major||sky blue with a hint of yellow|
|A major||mixture of lavender and light crimson|
|B major||silvery blue|
|Bb major||dark blue-gray|
|Eb major||mixture of dark crimson and violet|
|Ab major||dark-gray violet|
|Db major||dark blue-silver-gray|
|Gb major||dark olive-green|
Table of their relative minor keys:
|E minor||mixture of salmon and vermilion|
|F# minor||yellow ochre|
|C# minor||metallic silver|
|G# minor||dark green|
|D minor||light sky blue-gray|
|G minor||light olive-green|
|F minor||grayish yellow|
|Eb minor||dark vermilion|