The facade of your house could say a lot about your family and where it is, so before making any changes you should take into account the following:
Discover how is your environment Do you know it well? This is important so that you do not transform it into a house out of context.
Investigate about the house model you have, how it is built. This to know what elements you have or if there is one that needs to be highlighted.
Make color tests, paint sectors of your house with those you choose and so you can have an idea of how your facade would look.
Use some type of moisture blocker or waterproof before applying the final paint. This will prevent the interior from getting wet and will help the paint to last much longer without problems.