Flower nightmare

I really dont know where to turn. My wedding is in Spain next year and i met the florist who despite having a friend to translate didnt really seem to understand my wishes. She seems to think white should be the colour with a hint of blue. My dress is ivory and the bridesmaids light blue. I have spoken to a florist today now im back home and she advises white flowers will make my dress look dirty. I am so lost with this. HELP !!!!!