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.