Painting - Priming and painting light color over dark

I am going to be changing the color of one of my bedrooms from a medium blue (a little lighter than royal blue) to a sort-of lemon yellow. I had the paint store tint the primer close to the color of the yellow so I wouldn't need to use as much paint.

Anyone with any experience with the number of coats of paint I might need to apply to get good coverage in this situation?

I've applied one coat of primer and have 1/2 can left. Any advantage to applying a second coat of primer, given the big difference between the old and new colors? Will the the second coat of tinted primer mean I could get away with fewer coats of paint?

If I end needing to do 3 coats of paint, I end up with 2 half-cans (one primer and one paint). However, if a second coat of primer means I'll only need 2 coats of paint, then there's no waste and I save movey on the second can of paint.

Thanks in advance

I usually recomend only 1 coat of primer, 1 coat primer and 2 coats finish will wear longer and might look a little better.

If using 2 coats of primer will help with coverage and save you money - go for it.

I agree
Usually I'd say 1 coat primer, two coats color
But in your case I'd say go for it