"Mi cepillo es amarillo."
Translation:My brush is yellow.
Yes cepillarse is the verb. It is a reflexive verb which means that you put the se in your pocket then conjecate the verb finally you bring the se ato the front and change it to the reflexive pronoun. The reflexive pronouns are me (yo) nos (nosotros) Te (tu) os (vosotros) Se (ella,él,ud) se (ellas,ellos,ustedes)
This is a verb chart and they are always in this placment.