I want to have a random color where "Crimson" is defined
var stage = new createjs.Stage("demoCanvas");
var circle = new createjs.Shape();
circle.graphics.beginFill("Crimson").drawCircle(0, 0, 50);
circle.x = 100;
circle.y = 100;
stage.addChild(circle);
stage.update();
beginFill
accepts any color, also hex, so you just have to generate a random hex color
var stage = new createjs.Stage("demoCanvas");
var circle = new createjs.Shape();
var color = '#'+(Math.random()*0xFFFFFF<<0).toString(16);
circle.graphics.beginFill(color).drawCircle(0, 0, 50);
circle.x = 100;
circle.y = 100;
stage.addChild(circle);
stage.update();