The answer depends on the circumstances. If I actually sent the entirely wrong item: Do not open the bag, and contact me immediately to let me know about the mix-up. The options I offer you will depend on the status of the item you received, and whether or not I still have the correct one in my possession. Please, please, PLEASE do not open an item if it's obviously not the correct one! There may be another customer who had their heart set on that item and is also a victim of an accidental switcheroo. If all the items remain sealed, there's a chance that they can be exchanged and go to their proper homes. That's actually happened before, and everyone ended up happily united with their toys! But if one person opens their item despite knowing it's the wrong one, the outcome will not be nearly so ideal. If I sent the correct item but the colors 'look off': There's no way I can guarantee that a person's perception and my photos will be a 100% match; I take the best photos I can with the equipment and limited experience available to me, but the best pictures in the universe don't help when people's eyes and screens vary so greatly. Photos are provided as a general idea of the item's colors and overall condition, they are NOT a guarantee of absolute accuracy. Subjective opinions about the item's color are not considered refund or discount-worthy, as the item's color has no effect on its actual function.