The center probably looks translucent because it gelled in the center. It's almost impossible to get a loaf mold to be completely non-gelled. For that, you'd want individual bar molds.
Is there a particular reason you didn't want it to gel? Usually that's only a concern when using a super heater like milk, honey, or other unusual liquid where the gelling process may cause burning of the liquid.
Gelling is a normal part of the soap making process and there's nothing wrong with it, and in general I prefer to let the whole loaf gel rather than risk a partial gel like you may have. If it is indeed gelled in the center but not on the outside than it will look pretty much the same as it cures as it does now (the translucence will go away and be darker though).
Soap can change colors during the cure process, but that's usually when there is a fragrance oil (most notably vanilla-containing oils) involved. I would imagine your bars will have a slightly darker center as they cure and remain that way, but there's nothing wrong with them other than aesthetics!
Welcome to the addiction!