frameset-filter-sanitize-color
frameset-filter-sanitize-color is a compiled Lisp function in `frameset.el
'.
(frameset-filter-sanitize-color CURRENT FILTERED PARAMETERS SAVING)
When switching to a GUI frame, remove "unspecified" colors.
Useful as a filter function for tty-specific parameters.
For the meaning of CURRENT, FILTERED, PARAMETERS and SAVING,
see `frameset-filter-alist'.