Shouldn't be a problem, it will just be a shade or two darker with a slightly different malt character. Saison is a wide open rustic style (not that the BJCP sees it that way) so you can use all sorts of different ingredients to make a saison.
Boulevard's Saison Brett uses pale malt, and I think it tastes just fine. I would definitely use a lighter Belgian or American pale malt, not a British style.