The match heads of safety matches contain sulfur (sometimes antimony III sulfide) and oxidizing agents (usually potassium chlorate), with powdered glass, colorants, fillers, and a binder made of glue and starch. The striking surface consists of powdered glass or silica (sand), red phosphorus, binder, and filler.
Match heads are commonly red. This isn't the natural color of the chemicals. Instead, red dye is added to the tip of the match to indicate it's the end that catches on fire.