You can choose any color primer you want depending on the desired depth. The primer color guides are suggestion only and a good place to begin deciding which color is best for your project. If you need help you can ask This Girl anytime.
*Clear primer for all colors, especially if you want to distress.
*White Primer for whites and neutrals
*Gray Primer for medium to dark tones - yellows, blues and reds
*Dark Gray Primer for dark colors, deep blues, over writing, over patterns, overy anything multicolor, anytime you want to deepen a shade. Note: not always ideal for yellow, deep gray tends to "green up" yellow.