On Friday I had my hair trial and I really like everything except it turns out the flower I bought off Etsy doesn't match my dress

I love the flower, but it is much too white while my dress is more of a diamond white. Here is the pic with the flower:
and here is a pic of the back
I am thinking of purchasing another flower like this one (
CLICK) or this one (
CLICK). What do you think? Do you think those will look better or should I just stick with the white flower? Here is a pic of my dress (before alterations)
I am also tinking of replacing the bow on the sash with a matching flower too, if I can find the right one.