For spring business casual outfits, get a couple of pretty cardigans that you can wear over a pair of nice slacks and a plain top. If you get to twin sets that you can mix-and-match then you get 4 business casual outfits for the price of 2. Every now and then you should break away form strict business attire. A bit of a floral print brightens up a pair of plain suit slacks. And if  it’s an overcast day, then even more reason to wear bright colors.