Pick out colors or whites like you want. Paint on poster board, or buy the peel and stick color patches and put on poster board. Leave a white border all the way around the poster board, so it doesnt clash with the color you have now. Since you want the whole house the same color, then pick a color that goes in your kitchen with your cabinets etc first. Then try it in the rest of the house. The color in there now, does not go with your cabinets. It has way too much yellow in it. I would look for colors that have no yellow hues.

You have mostly warm colors in your house, so stick to warm colors for unity. A neutral is good if you're going to be here for under five years. If over five years, you can get more creative. Stay away from gray because that's a cool color and will clash with your warm colors. I agree with the prior poster who said paint on poster boards. Put the poster boards on different walls and at different times of the day.