Depending on the base it will go to a greige or full white (CCI), depending on the fabric of course.
You can vary activator amount to chase what you're after but consistency is nearly impossible, and it can be sad face time at the end of the dryer. We don't vary much from 5% here for just about anything.
Hate to say it, but this is one thing plastisol does well. Take some clear base, and a bit of white, and test. Much more consistent. We have several "clear tint" percentage mixes on the shelf. Same thing for going dark as well, just use black.