The input has to be a character string.of a color name.
There are 20 colors available from the SM palette:
`'blue'`,`'crimson'`, `'green'`, `'purple'`, `'orange'`,
`'skyblue'`, `'pink'`, `'limegreen'`, `'lightpurple'`,
`'brown'`, `'red'`, `'lightbrown'`,
`'asparagus'`, `'viridian'`, `'darkred'`, `'lightblue'`,
`'light blue'`, `'wine'`, `'yellow'`, `'lightgreen'`