mustache touch up

My husband began darkening his graying mustache with my black mascara. One morning he was in a hurry when he quickly touch up the mustache at our badly kit dressing table. On his return home, he was very agitated and asked me if there was something wrong with him. People had been giving him strange looks. I had tell him that in his haste he had used the wrong mascara, and that his mustache was now bright blue. It was the last time he touched it up.