If you are looking for a show stopping display of spring flowers then why not try planting primary colours of Red, Blue and Yellow in the same bed.
A sweeping display of blocks of colour contrasting with the other primary colours can have a stunning effect. Over planting with primary-coloured annuals will help the design continue through summer. This list starts off with bulbs in the primary colours but you can use whatever takes your fancy, as you will see, I like Polyanthus.