I love this design. It is very modern and quite blocky which I understand can be a love or hate thing. I assume you are wanting to change the entrance area and the pink paint.
If you were to change the pink paint, I would go for a taupe or grey which would work with the muted yellow. It would also pick up the tile and incorporate it into the design.
I would swap out your pots for taller and thinner pewter square pots with taller but brighter plants in them (either a small bamboo or a bougainvillaea depending where you live

ASV, leaving that very small patch of pink in the lower left gave this almost a Mondrian feeling to me. Quite cool!! The colors are obviously so different - but the angles so similar!

onthefence (I really wanted to suggest Mondrian for this) so it is clear that in the greater universe, although that was accidental.... there are no accidents!

agreed with a softer but darker shade of yellow.

The color options here are endless. You can replace the pink with any complementary color to the yellow. The Ben Moore website has a really nice tool for choosing complimentary colors.

For the stairs and the path, keep the angular theme going. A dark gray paver in a herringbone pattern would look great on the path and the porch. A random Blue Stone pattern would also look nice on the path.