The Seven Day Lighting Proof Palette Plan is a comprehensive guide for selecting a cohesive whole-home paint palette that remains stable across different lighting conditions. The method addresses the common frustration of paint colors that look perfect in stores but shift unexpectedly at home—turning yellow at dusk, green in hallways, or dingy under artificial light. The guide presents a structured 7-day process: Day 1 audits your home's lighting and surfaces, documenting natural light exposure, bulb temperatures, color rendering index (CRI), and reflective surfaces. Day 2 teaches undertone identification using visual controls and comparison techniques. Day 3 builds a strategic shortlist organized by room function and flow. Day 4 tests large samples under controlled variables across morning, midday, and evening. Day 5 selects trim, ceiling, doors, and sheens that support wall colors. Day 6 maps room-to-room flow and accent placement for visual continuity. Day 7 finalizes the palette with documentation standards. The method emphasizes measurable variables over guesswork—standardizing Kelvin temperature and CRI, using large format samples instead of chips, testing in corners where undertones reveal themselves, and maintaining undertone continuity across sightlines. The result is a palette that performs predictably from noon to evening, respecting your home's unique light and creating lasting confidence in your color choices.