the way you want to use it you change the complete mc. i don’t know how complex your “house” is, else you could do it wih drawing api.
for this moment the only way i can find out is, make a mc of the complete house and in that mc make the fill also a mc.
[AS]myColor = new Color(_root.completehouse.housefill);
myColor.setRGB(0xffff00);[/AS]
that should work