<Script Language="JavaScript">
  clr=new Array('00','20','40','60','80','a0','c0','ff');
  for (i=0;i<8;i++)
    {document.write("<table border=1 cellpadding=8>");
     for (j=0;j<8;j++)
       {document.write("<tr>");
        for (k=0;k<8;k++)
          {document.write('<td bgcolor="#'+clr[i]+clr[j]+clr[k]+'">');
           document.write('<tt><font color="#'+clr[7-i]+clr[7-j]+clr[7-k]+'"> ');
           document.write(clr[i]+clr[j]+clr[k]+' </font></tt></td>');}
        document.write("</tr>");}
    document.write("</table><br>");}
</Script>