SELECT t2.color_description FROM products AS t1 JOIN ref_colors AS t2 ON t1.color_code  =  t2.color_code GROUP BY t2.color_description ORDER BY count(*) DESC LIMIT 1
What is the description of the color for most products?
[Schema (values) (types)]: | products_gen_characteristics |  Ref_Characteristic_Types : characteristic_type_code (text) , characteristic_type_description (text) | Ref_Colors : color_code (text) , color_description (text) | Ref_Product_Categories : product_category_code (text) , product_category_description (text) , unit_of_measure (text) | Characteristics : characteristic_id (text) , characteristic_type_code (text) , characteristic_data_type (text) , characteristic_name (text) , other_characteristic_details (text) | Products : product_id (text) , color_code (text) , product_category_code (text) , product_name (text) , typical_buying_price (text) , typical_selling_price (text) , product_description (text) , other_product_details (text) | Product_Characteristics : product_id (text) , characteristic_id (text) , product_characteristic_value (text);