in setup() you can put the colors into an array like here:
something like this (or use append?)
for (var i = 0; i < notes.length; i++) {
colListForNotes[i] = lerpColor(color(255, 0, 0), color(0, 0, 255), i / notes.length);
}
OR you type the color manually like
var colListForNotes = [
color(255, 0, 0),
color(252, 0, 0),
...
];