May wedding colors in Chicago

I am having the hardest time deciding on my wedding colors. I still have time so it hasn’t hindered planning yet, but it’s getting down to the wire.
May 2nd in Chicago will probably be 60ish degrees so definitely not warm spring but not winter cold.
I originally wanted shades of blue when we were getting married in March and it would definitely be cold. Now that it’s in spring, I’m between blush, lavender, still into the blues. I just don’t know, and it feels like such a huge decision!!
How did you guys decide on your colors??
Another concern is that out of my 4 bridesmaids 1 will probably be very pregnant and another will have just given birth a few months earlier. I want my girls to be comfortable in their dresses so I was thinking of a more forgiving shade then a light pastel, such as navy. I can’t discuss it with them because I haven’t asked them yet! (Only my maid of honor and she will wear anything)
Any suggestions are very much appreciated!
*my fiancé wants to wear grey