When school starts in West Virginia next month, 240,000 students in districts large and small will notice something missing from their cafeteria trays. Gone will be red Jell-O fruit cups, yogurt topped with brightly hued sprinkles and Cool Ranch Doritos — all foods made with synthetic dyes. In their place will be foods that contain colors made only from natural sources — such as vegetables, spices and seeds — after West Virginia Gov. Patrick Morrisey signed a sweeping new law in March banning seven artificial dyes from school meals.