Founded in 1961 by Mark Addison, Design Master makes color sprays and dyes that let florists and floral artisans tint, transform, and finish fresh flowers without sacrificing creative control. Its signature Just for Flowers transparent dye preserves natural blossom detail, while ColorTool Spray offers fast-drying color for floral work and related surfaces. Since 2021, Design Master has operated as a division of Smithers-Oasis and sells its products around the world.