Klein blue Pop

Quick answer：

Klein blue is a deep blue pigment known for its intense and vivid color, often associated with its use in art and design. 'Pop' could refer to Pop Art, a movement in visual art that emerged in the mid-20th century, characterized by its lively, bold colors and simple, clever designs, often featuring popular culture imagery. The combination of Klein blue and Pop might refer to a style or art form that incorporates the distinct characteristics of both.