The image of the dress that broke the internet reignites the debate, but what colors do you see?

A debate that divided the internet in 2015 has been reignited, and social media users are no less passionate this time.

The question that sparked the original viral argument revolved around a photograph of a two-tone dress. Caitlin McNeill, a then 21-year-old aspiring Scottish singer, first posted the image on tumblr after noticing that her friends saw different colors in the photograph.

Opinions were divided on whether the dress was white and gold, or blue and black, and people also chimed in to discuss the science behind why people saw different shades.

The dispute was resolved after a photograph of the dress, taken by Roman Originals, came to light, proving that the garment is blue and black.

Now the dress makes waves again Twitter, after it was posted by a social media user who re-shared an image of the garment, which originally appeared on Redditalong with the caption “this changes the game”.

Once again, the image, which this time makes the dress appear blue and gold, sparked a slew of responses, including nearly 9,000 tweets with quotes, many from Twitter users fed up with the debate.

Responding to the image, one wrote: “we can leave this dress in 2015. We are tired of seeing it.”

Another added: “Please, I’m not strong enough to go through this again.”

Another Twitter user wrote: “I beg you people of the internet to find out how light works for God’s sake.”

However, some found the image interesting, prompting one to write: “Makes perfect sense how some of you see white and gold now.”

And another said: ‘Visit your eye doctor if you see anything other than a shade of blue and gold.’

The original photograph of the dress was taken by Cecilia Bleasdale in 2015, she bought it for her daughter Grace’s upcoming wedding.

He sent the image to the bride-to-be, who shared it with her boyfriend. They were the first people to disagree on the colors of the dress.

But when the bride-to-be posted the photo on Facebook, a disagreement erupted over the color of the outfit: some said it was white and gold, while others insisted it was blue and black.

The debate was forgotten until Caitlin McNeill, a close friend of Grace and her new husband, Keir Johnston, posted the photo on Tumblr days after the wedding.

Millions of people around the world were immersed in the original debate, including several celebrities.

And the hashtag #TheDress began trending around the world, quickly amassing over 1 million tweets mentioning the hashtag.

Among them was actress Mindy Kaling, who wrote about Twitter: ‘IT’S A BLUE AND BLACK DRESS! Are you kidding?

The then-married couple, Kim Kardashian and Kanye West, also got into the contentious debate.

Kim tweeted: ‘What color is that dress? I see white and gold. Kanye sees black and blue, who’s color blind?

Meanwhile, musician Taylor Swift wrote; “I don’t understand this weird clothing debate and feel like it’s a gimmick in some way. I’m confused and scared. PS IT’S OBVIOUSLY BLUE AND BLACK.”

And Justin Bieber kept his fans happy by telling them that he sees ‘blue and black’.

The scientific answer behind the debate is that it is an optical illusion.

Objects reflect light at certain wavelengths, or colors, and the human brain determines the color of an object by taking its reflected light.

But this perception can be thrown off balance by the color of nearby objects.

As wired.com notes, a digital analysis of the photo of the dress shows that one of the dots on the black border is actually orange in the photo.

Therefore, people who perceive the surrounding area as dark are likely to see the blue of the dress as white and the black colors as gold. It all depends on the way the brain perceives and processes color.

With the photo of the dress, the surrounding colors are so confused that the brain is not sure what to do with the dress itself.

Adobe, the color experts, also wrote about Twitter that, using your software, the dress is black and blue.