"

 Counterpoint 

Dear Jerome,

""And"" is the appropriate conjunction because it implies no relationship between harmony, rhythm, and color, which are not inherently related.  ""But"" is inappropriate because it falsely implies that harmony, rhythm, and color cannot differ without contradiction, and ""yet"" is inappropriate because it implies that readers would expect a contradiction where they would expect none.  Also, compromising between a correct and incorrect application of grammar's figuratively black-or-white rules commits the Golden Mean Fallacy.

-Duxwing

PS I know that I may sound arrogant or bitter.  I am neither.  )"