<!DOCTYPE html>
<html>
<head>
<!-- Adding the FabricJS library -->
<script src=
</script>
</head>
<body>
<script type="text/javascript">
var A = "hex(fff00f)";
var B = "hsl(12, 13%, 25%)";
var C = "hsla(10, 40%, 13%, 0.6)";
var D = "rgb(10, 40, 13)";
var E = "rgba(10, 40, 13, 0.9)";
console.log(new fabric.Color(A).getAlpha());
console.log(new fabric.Color(B).getAlpha());
console.log(new fabric.Color(C).getAlpha());
console.log(new fabric.Color(D).getAlpha());
console.log(new fabric.Color(E).getAlpha());
</script>
</body>
</html>