Controls the colour of the arrow for the dropdown
accentColour
Examples
const dropdown1 = $.makeDropdown($.w/2, 30, 120, [
"Option A",
"Option B",
"Option C"
]);
const dropdown2 = $.makeDropdown($.w/2, 80, 120, [
"Option X",
"Option Y",
"Option Z"
]);
function update() {
dropdown1.accentColour = "orange";
dropdown2.accentColour = "rgb(75, 15, 255)";
dropdown1.draw();
dropdown2.draw();
}