The dark one is not a lavender. The one on the left could possibly be, but I think I see splash markings in its crest; if it is a splash, it will develop more. There is a lot of confusion about lavenders, as some believe their diuted splashes are lavenders, partly because at hatch they look a solid self blue. Lavenders and many splashes look self blue on hatching, but splashes will develop splashing while lavenders will not.