This color is not correct.

颜色不对 is one of the most common sentences in Chinese quality control — and one of the easiest to get right or wrong depending on what you say next. The words themselves are simple: 颜色 (color), 不对 (not correct). The statement is clear, unambiguous, and perfectly appropriate for production feedback. In Chinese manufacturing culture, factual quality feedback is expected and respected. You don’t need to soften “the color is wrong” the way you might soften other forms of criticism. Color accuracy is objective; the supplier either matched the reference or didn’t.

What makes the difference between a resolved color issue and a week of back-and-forth is the reference you provide. Chinese factories work to physical or digital standards: a Pantone code (潘通色号, Pāntōng sèhào), a CMYK value for printing, an RGB or hex code for digital displays, a physical sample (实物样品, shíwù yàngpǐn) that you’ve approved. The most reliable method for physical goods is to send a physical color swatch or approved sample that the factory can match directly. Screens lie, photos lie, lighting lies, but a physical reference held next to the production piece tells the truth.

The technical term 色差 (sè chā, color difference/color deviation) is worth knowing because it’s the word factories use when discussing color accuracy. 有色差 means there’s a color deviation — it may be within tolerance or not. 色差太大 means the deviation is too large and the product is not acceptable. Most industries have an acceptable 色差 range, and good factories will tell you what their tolerance is. If color is critical, establish the tolerance upfront: 色差控制在ΔE<2以内 (keep the color difference within ΔE<2). This is specific, measurable, and prevents the “it looks different to me / it looks fine to us” argument.