I have just uploaded my site and an error message has appeared that wasn't there during development. Can you let me know what this means?

Notice: Use of undefined constant red - assumed 'red' in /home/nydms/modules/mod_j51hover/mod_j51hover.php on line 32 Notice: Use of undefined constant green - assumed 'green' in /home/nydms/modules/mod_j51hover/mod_j51hover.php on line 33 Notice: Use of undefined constant blue - assumed 'blue' in /home/nydms/modules/mod_j51hover/mod_j51hover.php on line 34

Regards.