Krista,
If the white is recessive and covering black you will get all black chicks.
If the white is recessive and covering any of the wild colors you will get all wild colors.
If the white is dominate you will get either white or the color it is covering.
You will only get lavender if the white is also a carrier but that is about 99% not possible since Lavender in LF is not very common. The only LF Lavenders that you may be able to find are OE Games and they are scarce. Most lavenders were upgraded from bantams which are available but still hard to find unless you go to Ideal Hatchery. They carry several different bantams that are either self blue or porcelain.
Remember to mark all of your chicks from the lavender X any other breeding so not to loose the trait and sell the wrong chickies. Good luck, hope the Lavender is beautiful. Harry