Is there any standard out there to adhere to other than the norm ABYC?

Currently we have all of the wire attached and secured in the engine compartment-- and am now looking to start under the dash. I have in my head what I would like to go where -- but being this is the first total rewire job on a boat I want to be sure that I wire according to a set standard if there is anything like that out there for these boats....

Thanks for any help/ direction...

You can see the standard wiring diagrams to use in a Mercury manual along with the correct color wiring.