What: Learn basic color theory, dye chemistry, and color mixing at the tie-dye expert’s seminar ($65). Apply your newfound knowledge at the after-party when you turn plain whites into psychedelic works of art ($15 per garment). Why: Up your bounty with 25 percent off the Shabd summer collection. When: Sat., 2:30 p.m. After-party, 4-6 p.m. Where: Ooga Booga, 943 N. Broadway, b/t W. College St. & Bamboo Ln., ste. 203, Downtown (213-617-1105). R.S.V.P. by Fri. to firstname.lastname@example.org.