Took the time yesterday to finally fix some issues with EnigmaBlue and then add some color variations. The fixes include decreasing the box shadows around the tables and a few little tweaks here and there.
The new colors include red, green, and silver, like the similar themes at Vanilla Forums. I've decided not to do a gold theme as its Vanilla counterpart isn't getting too many downloads. The names are EnigmaRed, EnigmaGreen, and EnigmaSilver.
All these themes should be available on MyBB quite soon.