High, but not in pitch: a gentle grey that doesn't sing soprano.
Alto is a light grey.
It can be described as light, pale and neutral.
Set in black, because black reads best on it.
The musical term alto, meaning "high" in Italian, historically refers to the contrapuntal part higher than the tenor and its associated vocal range. In four-part voice leading alto is the second-highest part, sung in choruses by either low women's or high men's voices. In vocal classification these are usually called mezzo-soprano, contralto and male alto or countertenor.
Read on WikipediaAlto is a planned high-speed rail line in Canada, intended to connect major cities including Toronto, Ottawa, Montreal, and Quebec City. The planning and development of the line is being overseen by a federal Crown corporation operating under the same name which is a wholly owned subsidiary of Via Rail Canada Inc.
Read on WikipediaProper noun