Fig. 3
From: Color inference in visual communication: the meaning of colors in recycling
The BCP-37 colors: eight hues (left to right: Red, Orange, Yellow, cHartreuse, Green, Cyan, Blue, and Purple) sampled at four saturation/lightness levels (top to bottom: Saturated, Light, Muted, and Dark), plus five achromatic colors (bottom row from left to right: black (BK), dark gray (A1), medium gray (A2), light gray (A3), and white (WH). Colors in the figure are for illustration only and are not colorimetrically accurate. See Additional file 1: Table S1 for coordinates in CIE 1931 xyY space