What is Delta E?
Also known as: ΔE
The numerical output of a color difference formula, expressing the perceptual distance between two colors. Lower is closer; values under 2.0 are considered commercial-grade matches.
In detail
Delta E is the result of comparing two colors using a perceptual color difference formula (CIEDE76, CIEDE94, or the modern standard CIEDE2000). The output is a single number where 0 is identical, under 1 is imperceptible to the human eye, 1-2 is barely perceptible only with side-by-side comparison, 2-5 is detectable but acceptable in many production contexts, 5-10 is clearly different, and above 10 is a complete mismatch. Textile production aims for Delta E under 2.0 between digital design colors and printed fabric colors. CIEDE2000 is the recommended formula for commercial textile work because it weights the perceptual distance more accurately for muted and low-chroma colors common in fabric design.
Example
A printed coral fabric measures Delta E 1.4 against the design file's TCX 16-1546 reference — within commercial tolerance. A second batch from a different facility measures Delta E 3.8 — visibly off, requires recalibration.