How Cross-Brand Paint Matching Works (and Why RGB Isn't Enough)

If you've ever tried to find a paint match by comparing hex codes, you've probably been burned: two colors with similar RGB values can look obviously different on a model. Here's why — and how to do it properly.

The problem with RGB distance

RGB is how screens store color, not how eyes perceive it. The numerical distance between two RGB values doesn't correspond to how different they look to a human. Greens, in particular, can be numerically close but visually miles apart.

Enter Delta E 2000

Color scientists solved this with CIELAB, a color space built around human vision, and a formula called Delta E 2000 (ΔE) that measures the perceived difference between two colors. As a rule of thumb:

• ΔE < 1 — the eye can't tell them apart.
• ΔE 1–2 — very close.
• ΔE 2–5 — close enough for most jobs.
• ΔE > 5 — a noticeable difference.

How brushmatch uses it

brushmatch converts every paint to CIELAB and runs Delta E 2000 against a database of 7,000+ paints from 26 brands. When you pick a paint, it instantly ranks the closest equivalents in every other brand and labels each one (Exact, Very close, Close, Approx) so you know how much to trust the match — no eyeballing required.

Try the color-science matcher →