Converting integers to hex string in JavaScript

Question

How do I convert integer byte values of red, green and blue to a hex string, which can then be assigned to a context for rendering onto a HTML5 canvas?

For example, convert cyan,

var r = 0; var g = 255; var b = 255; 

To a hex string for assigning to a context fill colour.

this.context.fillStyle = '#00FFFF'; 

Or is there a better way to do this altogether?

Answer 1

To convert a number to hex, you can use the built-in toString(16) function. Simple code:

function convert(integer) {     var str = Number(integer).toString(16);     return str.length == 1 ? "0" + str : str; };  function to_rgb(r, g, b) { return "#" + convert(r) + convert(g) + convert(b); }  var color = to_rgb(r, g, b);