Hi me and my partner are planning to get married sometime next year....

Hi me and my partner are planning to get married sometime next year. Thinking of a registry office and maybe have a hall for later. This will be my second wedding. However my question is I'm unsure of what colour bridesmaid dresses to choose as I'm going for an unconventional colour of dress... Silver /grey. Any idea please. Thankyou. This is my dress if that helps