RE: Disputed observation: is this dial colour shift real or just lighting? · RWI-01160

[QCNotebook 00347]

The difficulty is that phone cameras adjust white balance automatically, and blue dials are especially sensitive. Two photos of the same dial under different light can easily look like a 'batch difference'. Any comparison needs both dials in the same frame, under the same light, ideally next to a neutral grey or white reference card.