Our eyes are limited to the visible spectrum from 400nm -700nm. The visible spectrum ends at 400nm on the blueish- violet color spectrum. We cannot see beyond, or can we? The subsequent area, the ultraviolet area becomes visible with technology. With UV-spectroscopy the unseen can be transformed into data.
The color spectrum of the background and the embroidery ranges on the tipping point from the seen to the unseen in the area of 400nm.