As with @AndrewT., I can confirm that when I first saw this question, the dress was white and gold. It is now blue and black. Voting to reopen.

@ChrisW If there's a notable claim that can be answered using it, then I would vote to keep it in. The dress in this question has become something of a meme which makes it notable enough to warrant a proper answer. The scepticism here could be on any number of things: Does the dress change colour? Do some people actually see the dress as gold and white? Is it a hoax (i.e., are different images being displayed to different people?, is it a GIF?, etc.)?

@ChrisW I confirmed that I experienced the colour change as well (as opposed to some people only seeing one set of colours and others another). The fact that you know that this is an optical illusion doesn't make this question incompatible with this site. If this exact optical illusion has been explained in some other question, then this should be marked a dupe of that. Else, it should be reopened and answered. I mentioned GIF vs. JPEG w.r.t the Internet-audience-at-large (who will hopefully benefit from a good answer to this question).

The problem with the "change color" claim is that I see it red and pink. Sometimes it's actually rainbow colored. I am lying, but you can't disprove me.

No, but it's clearly unanswerable beyond anecdotal evidence/opinion/hearsay. Even beyond that, the question is clearly about a current unresolved event.

@JanDvorak comments are not to provide answers, especially on questions on hold.

@Sklivvz I don't see why the question can't be opened to see if anyone can actually provide an answer. Why jump to conclusions? For example, the Wired article (cited in some of the links in the comments) features explanations by neuroscientists on why the differences in perception occur and could be a starting point for a good answer.

@coleopterist I am not jumping to conclusions, the question has problems and it should be fixed to something answerable according to the rules of this site, especially if it's a viral topic which attracts new users. The non-direct/non-factual version of this is already on Cognitive Sciences.

@Sklivvz Refactored.

I've removed the speculative part. Note that the answer is trivial. The pixels of the image are blue. One just needs to find someone that has done the analysis.

@Sklivvz Well, you deemed the non-trivial angle to this question to be anecdotal. And I tried to piggyback the colour change onto this question. Would reworking it further with this article change your mind?

@coleopterist it's not going to work

this is not even a truly notable claim yet. it's just 1 day old, a bunch of people are speculating... it's not really a topic for skeptics.

which is why we have the "current event" close reason

Is the question asking about the color of the dress, or about the color of the picture?

@Sklivvz Are expert opinions still considered speculation?

yes of course

note that in this case there are dissenting opinions, it's ok to present them, and sustain a weak answer but...

The fact that my Mom asked me to explain it makes it notable :P

nope, it just means it's notorious.

@ChrisW either.

Erm. No.

Anyhow. I'm off.

Good for you. I'll be here deleting bad answers :-( 2 already...