I know that if I want a specific shoe in a specific color I need to pay for it, but I don't love that super uniform look. The girls are wearing black and the colors are a jewel tone and silver/grey neutral. Can I just say they can buy any jewel tone shoe? I don't care about style or heel height or if two end up with purple. I just want the girls to be comfortable. If I only specify "jewel tone" is it proper etiquette for me to pay for them?