In fillStyle="rgba(0,0,200,1)"; (1) What does 'a' mean (2)Is 0-F not the range of values for rgb? How 200 for b and still works

Question

var canvas=document.getElementById("canvas1");
var ctx=canvas.getContext("2d");
ctx.fillStyle ="rgba(0, 0, 200, 1)";
ctx.fillRect (36, 10, 22, 22);

Answer 1

RGB - RED, GREEN, BLUE

(1) The 'a'(alpha) is for opacity, which ranges from 0 - 1
(2) 0-F is the range for hexadecimal colors not RGB colors
(3) RGB color's range is from 0 - 255

Answer 2

What's the difference between Hexadecimal colors and RGB?

Answer 3

Thanks