Convertir de RGB a Hexadecimal en Javascript

Convertir de RGB a Hexadecimal en Javascript

Copiamos el siguiente Script en un archivo llamado color.js y lo incluyen dentro de la etiqueta head del HTML principal:

color.js

#Developer

 1 _rgb = function(rgb){
 2     var hexDigits = new Array ("0","1","2","3","4","5","6",
 3     "7","8","9","a","b","c","d","e","f");
 4 
 5  return {
 6    toHex: function(rgb){
 7     rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
 8     return "#" + _rgb.hex(rgb[1]) + _rgb.hex(rgb[2]) + _rgb.
 9     hex(rgb[3]);
10    },
11    hex: function(x){
12     return isNaN(x) ? "00" : hexDigits[(x - x % 16) / 16] + 
13     hexDigits[x % 16];
14    },
15  };
16 }();

#Production

 1 _rgb=function(e){var t=new Array("0","1","2","3","4","5","6",
 2 "7","8","9","a","b","c","d","e","f");return{toHex:function(e)
 3 {e=e.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);return"#"+
 4 _rgb.hex(e[1])+_rgb.hex(e[2])+_rgb.hex(e[3])},hex:function(e)
 5 {return isNaN(e)?"00":t[(e-e%16)/16]+t[e%16]}}}();

index.html

 1 <script type="text/javascript">
 2  alert(_rgb.toHex('rgb(255,0,255)'))
 3 </script>

Y listo eso es todo!.