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Hexadecimal Color Inverter

/ Published in: JavaScript
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By Matt Lagrandeur

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  1. function invertHex(hexnum){
  2.   if(hexnum.length != 6) {
  3.     alert("Hex color must be six hex numbers in length.");
  4.     return false;
  5.   }
  6.  
  7.   hexnum = hexnum.toUpperCase();
  8.   var splitnum = hexnum.split("");
  9.   var resultnum = "";
  10.   var simplenum = "FEDCBA9876".split("");
  11.   var complexnum = new Array();
  12.   complexnum.A = "5";
  13.   complexnum.B = "4";
  14.   complexnum.C = "3";
  15.   complexnum.D = "2";
  16.   complexnum.E = "1";
  17.   complexnum.F = "0";
  18.  
  19.   for(i=0; i<6; i++){
  20.     if(!isNaN(splitnum[i])) {
  21.       resultnum += simplenum[splitnum[i]]; 
  22.     } else if(complexnum[splitnum[i]]){
  23.       resultnum += complexnum[splitnum[i]]; 
  24.     } else {
  25.       alert("Hex colors must only include hex numbers 0-9, and A-F");
  26.       return false;
  27.     }
  28.   }
  29.  
  30.   return resultnum;
  31. }

URL: http://www.mattlag.com/scripting/hexcolorinverter.php

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