Some other suggestions, 'Dragon Wing' begonia (these could substitute for the geraniums, they bloom until a freeze and will do well in anything from full sun (here in the north, don't know about elsewhere) to deep shade. For something blue and more unusual Browallia does well in partial shade (doesn't like to dry out, especially to start with). Fuchsias like part-shade too, also Torenia and lobelia. Nicotiana (flowering tobacco) is another thought. For ease of maintenance and prolonged display in various conditions it's hard to beat the 'Dragon Wing's though.
