It could be some inflammation of the gums in that area or a local reaction of the gums to the temporary material. This should disappear when the laminates are placed.
they may have been made with too much translucency (in the material itsself) in that area, or, they may have been made too thin in that area (which may be the dentist's fault for not removing enough tooth structure by the gumline) or the dentist have chose the shade for the cement poorly, or the shade ofthe porcelain poorly. More than likely it is one of the first 2 reasons----both of which can cause too much transparency in the material. your situation needs to be reported to the dentist who did them-- if you are that unhappy, you should request that they be redone. you may want to first seek a 2nd opinion as to why this is from a dentist who does a lot of cosmetics (and to whom you are referred by a happy friend or family member).This way youhave some ammunition when you see the dentist who placed your veneers. He or she will not want to do them over, nor will you easily get a refund. Be prepared for that.
you said temporary right? discuss this with your dds. temps are made to look like your teeth but at times they dont use the correct color and trans. so they dont look as natural as you would like. your permenant ones should be shown to you prior to cementation so you approve of them. i hope everything goes well with your permenant veneers!
my mistake....... did not realize they are temporary. don't be so picky with temporaries. they are hard to make and will not be perfect. your permanent ones hould not have this problem.