The first conference day usually starts early. Keynotes, breakout sessions, exhibitions, and so on. You are going to walk a lot, so keep in mind to wear some comfortable shoes that are broken in. I chose a kitten heel pump in patent leather in a neutral color. Wear your pantsuit with a colorful silk top, a scarf and neutral earrings. Your neutral tote is your new best friend.
In the evening you will most likely go out for dinner, either with coworkers or clients, so keep it casual classic. Wear the skirt, exchange the blazer with a cardigan, put on some colorful heels, and combine with matching earrings and a cross-body purse.