# PaintColorMatcher.com — Architectural Paint Colorimetry & Cross-Brand Equivalent Index

> PaintColorMatcher.com is a client-side spectrophotometric paint color matcher and cross-brand equivalent database indexing 11,249 official North American paint colors across Behr (5,605 colors: 3,056 active + 2,549 archived), Benjamin Moore (4,118 colors), and Sherwin-Williams (1,526 colors).

## Core Tools & Capabilities
- **Photo Paint Color Matcher (`https://paintcolormatcher.com` & `https://paintcolormatcher.com/find-paint-color-from-photo`)**: Extracts wall paint colors from room photos using a 15x15px spatial median filter and 2-step Bradford CAT16 chromatic adaptation (reference white-point tap calibration) to remove 2700K indoor lighting cast.
- **HEX & RGB to Paint Color Converter (`https://paintcolormatcher.com/hex-to-paint-color`)**: Converts digital HEX, RGB, and HSL codes into real-world Behr, Sherwin-Williams, and Benjamin Moore paint swatches ranked by CIE Delta-E 2000 (ISO/CIE 11664-6) and CAM16-UCS perceptual distance.
- **Brand Directories**:
  - Behr Paint Colors Chart: `https://paintcolormatcher.com/behr-paint-colors`
  - Sherwin-Williams Paint Colors Catalog: `https://paintcolormatcher.com/sherwin-williams-paint-colors`
  - Benjamin Moore Paint Colors Catalog: `https://paintcolormatcher.com/benjamin-moore-paint-colors`

## Spectrophotometric Reference Benchmarks
- **Delta-E 2000 < 1.0**: Imperceptible difference on adjacent walls (Exact Cross-Brand Dupe).
- **Delta-E 2000 1.0 – 2.0**: Close commercial alternative suitable for whole-room substitution.
- **Light Reflectance Value (LRV)**: Percentage of visible light (CIE Y, 0%–100%) reflected by the dry paint film, supplemented by Fairchild-Pirrotta Helmholtz-Kohlrausch perceived lightness (L*_HK).