I found a website that might be quite helpful for you http://www.colourtouch.com.au/ to visualise what colours and finishes could look like on your house. You can choose a style of house that closely matches yours then choose a number of set schemes, or start with a blank canvas and play around with any colour / finish you like.

grey and white always look good but Google "choosing colour schemes" for all the different paint companies services for matching colour schemes

Hi Pele - I hope you don't mind, but to my mind the thing that immediately jumps out at me as not fitting is the colour of the orange terrace tiles! The wall colour and roof colour seem in the earth/cool ochre range, and sort of complement the cool grey driveway even though they are different. The terrace tiles being bright orange clash! If you do/don't have the budget, I would prioritise painting or staining these tiles the Basalt colour which is a deeper grey like bluestone! Or even better switch your budget to retiling this area with a deeper grey or bluestone exterior tile. Add a few plant pots - and I love your timber garage door and possibly timber balustrade - and it would be dramatically transformed! I think this would be a better impact-for-dollar than painting the roof tiles which look to me to be in good condition. Good Luck!

I agree with black bamboo and oklouise -- everything looks 60's , but in a clean , updated way , with 2 exceptions and a comment ! The two that are out of character is the roof ( but its livable ) and the portico . Even the gardens look 60's inspired , and I like the overall effect . Thge comment -- it needs more colour , a bit of wow ! So the very first thing I'd do is the front door in the brightest fire engine red gloss I can , it both references the brick but it adds the wow in a small way . It will take some of the focus off the portico , but probably not enough for my taste . So I'd probably do it in Surfmist or similar -- OR a 50's apricot with a bright orange door if you are brave ! But the upstairs still lacks something -- too mehhhh . The grey in the windows I am guessing are roller blinds ? I'd change them for a mid red or orange , but that may not work with the interior colours ? So maybe wooden venetians -- brings in the natural element and touch of class , and still works well with most interiors . Especially if going wooden , I'd do downstairs windows the same -- if going for coloured roller blinds maybe not . It will look more uniform and thought out for $10-15k ( less if you do some or all yourself ) IMO .