for example International (make) Micron Extra 2 (type) blue and International Micron Extra 2 dove white should be fine to mix. But not necessarily Micron Extra 2 and International Cruiser Uno for instance. But it's always best to confirm with the maker's tech helpdesk. It could be a costly error.
Out of curiosity, why the hangup. The AF is underwater who really is that concerned about hue?
I refer to the make as the manufacturer eg. International (the brand) and the type as the product eg. Micron. I would not mix Micron with Interspersed for example.
Last season used white AF paint and had a lot of issues with growth. Some told me that darker colours attract less growth, and since I do not like darker colours, I opted for a different colour (at least I will know where I painted. No big deal about colours
You mean you wish to overcoat an old AF rather than mix? Same rules really apply. Best to speak to the tech help desk if a different type. I needed to put a base / primer coat on first before changing type.