The full set of fills used in the current ARCHICAD project is available in the Fills Dialog Box (Options > Element Attributes > Fills).
Fills in the pop-up are grouped according to type: Solid, Vectorial, Symbol, Gradient and Image.
You can modify this set manually or by importing items with the Attribute Manager.
Not all of the project’s fills are available in every fill pop-up.
For more information, see Defining Fill Availability in Pop-Ups.