Dyeing is the technique of giving cloth or yarn colour by means of dyes. Historically humanity used natural dyes: plants (madder gave red, woad blue, onion skins yellow), insects and minerals; in Ukraine dyeing with plant dyes was an inseparable part of the weaving and embroidery crafts. Modern dyeing is a whole science of dye types, temperature, colour-fastness and evenness. There are also artistic techniques — tie-dye, ombré, shibori — where the dyeing itself becomes the pattern. Correct dyeing determines not only the colour but also whether the piece will later fade or bleed. It is the foundation of the entire colour culture of fashion.