Negative Space

TSC 1 June - negative space featuring the colour blue, which cannot be sky.

Clue here... Original item

Wine Companion

Negative space, in art, is the space around and between the subject(s) of an image. Negative space may be most evident when the space around a subject, and not the subject itself, forms an interesting or artistically relevant shape, and such space is occasionally used to artistic effect as the "real" subject of an image. The use of negative space is a key element of artistic composition.
Wikipedia