I am managing a large inventory database in which each item, jewelry, is photographed and imported into FM 8.5. The imported photo is darker as displayed in FM than when it is viewed in Photoshop or in any other application.

We're tried making the photos lighter before import but then we also use the photos to post on a website so we have to make two versions of the same photo.

Does anyone know why this is happening?

photoshop is a color managed program FM is not i suggest you convert all your images to the Srgb display gamut before importing see if that fixes your problem. they may be in Adobe1998 color space at the moment. what happens if you preview the images in a browser does the same thing happen ?