All is black.
Within the black are three numbers, tall, three dimensional numerals in bold colors against the black.
From left to right, first comes a 2 in bright Red. Second, a Blue numeral 1, and third, a 3 I could not see - either because it was invisible, or because it was as Black as everything that was not a number.
Aside from these numbers, nothing can be seen, but there is also something green there. Something I cannot see. It could be that the three is indeed invisible, but were it visible it would be green. Or it could be something that I simply did not see.
Do you see why I do not understand?