Yes, for a speech you can wear a black long sleeve, tailored jacket with a fuchsia colored sleeveless chemise style dress and black patent pump style shoes. Draw attention to your head area by wearing something around your neck (necklace or scarf) and / or good-looking earrings.
Dressing for Evening Business Events
Evening business events after work are usually a little more dressy than daytime office attire. Dress on the conservative side (forget sparkly and shiny) since you will be judged by others. Your presentation might mean getting or not getting a promotion. You want to look poised and that you have good judgement at every business event.
Color and Business Attire
Color implies energy and a youthful attitude. Top executives in any company set the fashion trends for the office workers. Women who have reached high levels in their fields are more confident and not afraid to wear more color even in many conservative companies. Before you decide on how much color you can wear to the office consider the top executives and how they dress. The type of work environment in your organization is another important factor.