encontre un codigo para verlo aqui lo dejo por si a algien mas le sirve
<center><table width="80%">
<script language="javascript">
var r = new Array("00","11","22","33","44","55","66","77");
var g = new Array("00","11","22","33","44","55","66","77");
var b = new Array("00","11","22","33","44","55","66","77");
for (i=0;i<r.length;i++)
for (j=0;j<g.length;j++) {
document.write("<tr>");
for (k=0;k<b.length;k++) {
var nuevoc = "#" + r[i] + g[j] + b[k];
document.write("<td bgcolor=\"" + nuevoc + "\" align=center>");
document.write(nuevoc);
}
document.write("</tr>");
}
var r2 = new Array("88","99","AA","BB","CC","DD","EE","FF");
var g2 = new Array("88","99","AA","BB","CC","DD","EE","FF");
var b2 = new Array("88","99","AA","BB","CC","DD","EE","FF");
for (a=0;a<r2.length;a++)
for (b=0;b<g2.length;b++){
document.write("<tr>");
for (c=0;c<b2.length;c++) {
var nuevos = "#" + r2[a] + g2[b] + b2[c];
document.write("<td bgcolor=\"" + nuevos + "\" align=center>");
document.write(nuevos);
}
document.write("</tr>");
}
</script>
</table>