The phrase "blue watercolor" refers to a painting technique using blue pigments that are diluted with water to create a transparent and fluid appearance on paper or canvas. Full definition
For the tablescape, the inspiration all started when I found these amazing pink and blue watercolor plates at the thrift store. (amidstthechaos.ca)
Jan Bruegel (1568 — 1625), A View of the Tiber in Rome with the Ponte Sisto and Saint Peter's in the Distance, ca. 1594, pen and brown ink and wash and blue watercolor over black chalk, Thaw Collection, The Morgan Library & Museum, 2017.20. (artssummary.com)
Featuring a handsomely framed, sublime abstract watercolor, the Light Blue Watercolor Framed Art Print adds beauty to any décor. (bedbathandbeyond.com)