Hi EZ4HZ,
The color of natural latex can vary depending on the type of latex and even from batch to batch or between different manufacturers so it could be any of the colors you mentioned. Talalay will often be lighter than Dunlop and in the range of whiter or creamier or slightly yellower while Dunlop will tend to be a little darker in the tan range or gray range although both can have some discoloration that may be more orange or brown.
The cell structure of blended Talalay would also be a little different because of the differences between the consistency of natural and synthetic rubber (see post #2 here about natural vs blended Talalay).
Phoenix