There are 9 basic color families, that can be grouped into 3 types of colors.
Warm Colors: Red, Orange, and Yellow
Cool Colors: Green, Blue, Purple
Nuetrals: Grey, Brown, White
From these nine basic color families, pick the one or two color families that you like and think would look good on your house, and then pick out some individual colors from within those families to get swatches. Don’t get too caught up looking for the silver bullet paint color, finding the exact color you like might take some time. Just try to figure out which color family is the best and that will really narrow down your choices.
As a side note, I’d completely ignore “color schemes”, accent colors, or secondary colors, until after you have chosen your main color. The accent colors are dependent on the main color of your house. Trying to figure the accents colors before you have figured out the main color will have you running around in circles, like a dog chasing its own tail, until you are dizzy and fall down. Once you had decided on the main color of your house, you will find picking an accent color comes naturally.