this pink color is known as blushing and happens in female scallops.it does not change the taste or quality of the meat and in fact .some prefer it pink.here is more formal explanation you can pass on your customer.
orange meat is caused by and excess of a natural pigment called zeaxanthin in a female scallop. as the gonad ripens and takes on an orange hue, any overabundance of this pigment is transported into the adductor muscle .the part of the scallop we eat. meat quality or taste is not affected and some markets may prefer this color variation. unlike some shellfish that have both male and female parts in one animal,atlantic sea scallops exist as separate males and females.spawning occurs in july and august along much of the maine coast though gonads also will ripen in january and february