Assign one role to each color
The main wall color usually carries the most visual weight. The trim color explains edges and openings, while the accent color attracts attention to a small feature such as the front door. This hierarchy keeps three colors from competing equally.
The percentages do not need to follow a rigid formula. What matters is a clear dominant color, a smaller supporting color, and a genuinely limited accent.
Control contrast across the whole elevation
High wall-to-trim contrast makes rooflines, windows, and columns more prominent. Close values create a quieter effect and can simplify a house with many small details. The accent can be stronger because it covers less area, but it should still relate to the roof, landscape, or another repeated element.
- View colors at their intended proportions, not as equal swatches.
- Repeat the accent sparingly so the front entry keeps priority.
- Include fixed window and gutter colors when judging the total number of colors.
Test the transitions
Pay special attention to places where wall meets trim, trim meets roofing, and accent meets hardware. These boundaries reveal whether undertones cooperate. Visualize the full layout, then place physical samples beside the actual materials before approving the palette.