tennis dress blue Swift casual style Wilson Women's Winning Tennis Dress

Indeed, if we connect the two squares, it becomes clear that the squares are identical shades: Below is another optical illusion based on color, as pointed out by New Scientist (which has an excellent dress explainer)

[54] [55] As the original authors of the photograph that sparked the viral phenomenon, Bleasdale and her partner Paul Jinks later expressed frustration and regret over being "completely left out from the story", including their lack of control over the story, the omission of their role in the discovery, and the commercial use of the photograph

I love this look

The tie set finishes off the whole look