Grind the slab!

Your lounge looks like it receives a lot of sun so you might like navy, turquoise, or emerald green for the room. Whatever color you pick, leave the valances (?) above the windows close to the color of your air conditioner, so it won't be too obvious. Use lamps and update the ceiling fixtures. Bamboo blinds might look fun on the windows. Look to the kitchen floor for paint colors in there. It appears the range hood is way too high to be effective. Is that just the perspective?

The all black kitchen looks scary as. Maybe because there's no lightness in there at all.

Without knowing any more info , I'd say its near impossible for anyone but you to know what colour/s to choose -- do you want the house to blend in but have its own style , or do you want it to stand out ? What colours are your main furniture items and even kitchen etc ? For xxample , if keeping the beige walls , how about doing the eves and gutters and garage door in a tangy ( bright , but not glaring ) orange -- this would work with the existing colours and not require a complete repaint . BUT if your kitchen was mainly various shades of , say , green and teal , and your lounge suite and duvet covers were mainly blue hues , that may 'feel' funny , clashing with the exterior ? Of course , blue and beige exterior may not work with the brown aluminium , as youve recognised . Another option ( a bit hard to tell from the pictures ) is that a light grey ( repaint the beige ) with mid-charcoal base boards may work with the brown aluminium , then a bright colour on the gutters and front and rear doors to suit -- anything from sea blue to bright yellow , orange , red , even white or off-white would probably work .