Ramen makes use of a simple "struct" facility. Used for structs that are passed on the stack. (Objects don't use these words.)
To declare a struct say
sfield ( struct bytes valtype -- <name> ) ( adr -- adr+n ) defines a struct field.
svar ( struct valtype -- <name> ) is short for
struct cell 0 sfield.
Valtype is obsolete and not used so you can set it to anything.
sizeof gets the size of a struct.
struct colorcolor 0 svar color.rcolor 0 svar color.gcolor 0 svar color.bcolor 0 svar color.a