These things are the subject of a “sphere” used in modified form for Johannes Itten’s Preliminary Course at the Bauhaus and designed by Philipp Otto Runge (10[1])(“ROON-guh”). J. M. W. Turner referenced (10[1])an iconoclastic book about these things in the title (10[1])of a painting that depicts the morning after the biblical (10[1])flood. A triangle with nine segments that demonstrate these things is often named for (10[1])Goethe (10[4])(“GUR-tuh”), who used symbolic (10[2])labels like “unnecessary” (10[1])in his Theory of them. (10[5])Charles Blanc’s theories about these things (10[1])“mixing” in the eye (10[2])inspired Paul (10[2])Signac (“seen-YAHK”) and Georges (10[3])Seurat (10[1])to develop (10[2])Pointillism. (10[9])Harlequins (10[1]-5[1])and (10[1])sad, (10[1])lonely subjects respectively characterize two (-5[1])Picasso periods named for these things. (10[3])For 10 points, name (10[1])this painting element described by value, saturation, (10[1])and hue. ■END■ (10[1])