Are you using the latest version?
I just recall, that I had already fixed this issue a long time ago. I downloaded the search from codecanyon, checked the source and it is fixed, the “hex2rgb” function is not existing there anymore I have renamed it to “wpdreams_hex2rgb” to prevent such errors. All you need to do is download and install the plugin again and it should work with no problems.
If you like my products, don't forget to rate them on codecanyon :)