Help creating an ArrayList of color values

[monkstone]

IntList palette;

void setup() {
  size(200, 200);
  palette = new IntList();
  palette.append(color(255, 0, 0));
  palette.append(color(0, 255, 0));
  palette.append(color(0, 0, 255));
  println(palette);
}

void draw() {
  background(palette.get(2));
  fill(palette.get(0));
  ellipse(width / 2, height / 2, 100, 100);
}