Well, technically ivory is itself a shade of white, so even if it is ivory, calling it white as an overarching classification means it's exactly as described.... In other words, a complaint that something is ivory and not white, is a little bit like saying something is navy, and not blue. (TBF, some of the colours below I'd be more inclined to describe as beige or yellow, and you'd probably find yourself with similar situatuations from buyers if you described something that looked like it was the peach colour shown and called it white, but I looked at the bag and while I can see it may not have been a true white as shown in the chart below, it seems a long way off from a dark ivory, and doesn't have any warm or yellow undertones).
Shades of white, in the spoiler, according to Wiki
Messages like these are difficult, because the buyer is taking the time to express displeasure but gives no indication at all what - if any resolution they'd like or are expecting. I wonder if it's because they either have no expectations of a solution, or know full-well they're trying their luck and banking on the seller to go above and beyond on a minor issue because they have no baseline to start with, if that makes sense. I'm often tempted to reply similarly, as in acknowledge the message but not offer any options. eg "Thanks for your message, sorry to hear the item doesn't match your expectations, that can be disappointing. Let me know if I can help with anything else. Kind regards, [Seller]".
In this case, I'd personally (and actually) respond much like kopes, particularly as you had no returns selected and colour interpretations are very subjective, except I'd only offer a refund of item price.
Seriously, though, for someone whose wardrobe is obviously so sensitive to slightly varying shades,online shopping sounds like the furthest thing from suitable for them.
