Hello Fellow Calgarian, years ago I was a trainer for the Color Seasons which suggest which colors look best on a person. Turquoise or peach are two suggestions which might look good on all of your bridesmaids. You will find that the red head and the strawberry blond will look best in colors that have a yellow base, whereas the dark haired girl and the blond will probably look best in colors with a blue base, e,g, pink. Some people argue that the bride is the one who is in the spotlight so don't worry about the bridesmaids. However, if the color really clashes with the girl, people will really notice that the bridemaid did not look good and I'm sure you want your wedding to be perfect. The dress that you choose for the bridesmaids is very sweet! You can find out which colors are best for the bridesmaids by asking them to tell you what their favourite colors are - you'll get lots of different answers. None of them will agree on the same color so you need to choose what you feel most comfortable with. You look like a summer who would like blues, pinks, purples, etc. and from looking at the beautiful dress you choose you for your gown, you are a romantic girl who loves feminine things. When choosing colors, most of us pick clothes in our own season sp keep that in mind for your wedding part. Your two girls with the red hair are not going to look good in summer colors.
I hope this helps and be sure to let me know what color you chose. Have a wonderful wedding!