The CVD Score determines how different your chosen colors look to someone with color blindness. The tool treats these colors as points in a 3D grid and measures the physical distance between them using the Euclidean distance formula. A low score means the two colors have moved so close together that they become nearly impossible to tell apart, while a high score confirms that the colors remain distinct and accessible for all users. A "passing" score ranges from 80–100, "warning" from 55–79, and "failing" from 0–54.