I would continue with the sharkskin as siding, it works so well with your brick!
For the roof - copper colour and if you use metal, that would update the look of the house a lot.
I would do all the eaves in black to have it disappear.
The light at the front door and the black chair looks great. I love the concrete floor and concrete step at the door. Paint the front door ceiling too, maybe a lighter version of the sharkskin or a concrete colour.
Concrete pots or accents or outdoor seating will complete the look!

hi Elsabe....you have given me lots to think about. I had to chuckle as my husband said the same, Sharkskin for the siding. ;) I'll take another look at the shades for the aluminum siding as I wasn't thinking that dark. Interesting!!