37.17.4 XPM Images ------------------ To use XPM format, specify ‘xpm’ as the image type. The additional image property ‘:color-symbols’ is also meaningful with the ‘xpm’ image type: ‘:color-symbols SYMBOLS’ The value, SYMBOLS, should be an alist whose elements have the form ‘(NAME . COLOR)’. In each element, NAME is the name of a color as it appears in the image file, and COLOR specifies the actual color to use for displaying that name.