Relative to paint drying times, primers are quite fast drying with re-coat times usually within the 1 to 2 hour range.

Paints vary according to how much pigment is placed in them. Light colors are usually in the 1 to 2 hour range. Dark colors can take several hours to avoid problems. A good rule of thumb is to allow one hour of drying time for each ounce of colorant in them.

If you ere, ere toward generous dry times. Rushing the re-coating can cause all kinds of problems; lifting of the previous coat, streaky look, etc.

As the other contributors have stated, if all else fails, read the directions on the cans! But do give extra time with those dark colors, especially dark colors in the higher sheen paints.