Truth is inclusive, neither black nor white, nor a shade of grey. Indeed truth is multicolored spectrum, a beautiful hologram. - Peter Shepherd

That would mean that the colour was whatever we said it was, when shouted loud enough or repeated over and again. Eventually, people might believe these market criers.

And those two bring me back to the famous blue and black, or white and gold, dress of 2015.

https://en.wikipedia.org/wiki/The_dress

The dress itself was confirmed as being a royal blue "Lace Bodycon Dress" from the retailer Roman Originals, which was actually blue-and-black in colour; although available in three other colours (red, pink, and ivory, each with black lace), a white and gold version was not available.

Still, looking at the original picture, I can't help but to see it as white and gold.

So what is the truth about what an obectivist would probably consider as personal bias vision?

Neuroscientists Bevil Conway and Jay Neitz believe that the differences in opinions are a result of how the human brain perceives colour, and chromatic adaptation. Similar theories have been expounded by the University of Liverpool's Paul Knox. Conway believes that it has a connection to how the brain processes the various hues of a daylight sky, noting that "your visual system is looking at this thing, and you're trying to discount the chromatic bias of the daylight axis. ... people either discount the blue side, in which case they end up seeing white and gold, or discount the gold side, in which case they end up with blue and black." Neitz remarked:

Our visual system is supposed to throw away information about the illuminant and extract information about the actual reflectance... but I've studied individual differences in colour vision for 30 years, and this is one of the biggest individual differences I've ever seen.

One hypothesis focuses on the naming of colours as a possible explanation. According to this view, the eye can differentiate between over 3 million colours but we only have names for 20 to 30 of them.