5.1.1 Colour Code System
This paragraph aims to introduce two colour code systems.
(a) Building material and description on floor plans
PNAP ADM-9 specifies that every plan submitted for approval should be coloured to differentiate existing works from proposed new works. The preferred colour code as shown in Appendix A of PNAP ADM-9 should be adopted.
(b) Gross Floor Area (GFA) diagrams
The preferred GFA colour code as described in Section 5.2.10 of the Guidelines should be adopted.
Guidelines for Using Building Information Modelling in General Building Plans Submission 