Avavawn

I have been comparing my undertone in photos but my results change more than I expected. Near a north-facing window my skin looks fairly neutral while warm indoor bulbs make it look noticeably golden. My phone also applies automatic white balance even when I keep the same position and background. I tested with no makeup and a neutral top so clothing should not be adding much reflected color. I am comparing the photos with a simple <a href=https://hairdye.top>skin undertone test camera</a> rather than trusting one image. Would it be better to lock exposure and white balance before taking a short series of photos? I can also include white paper and a gray card in the frame if that makes the comparison more useful. For those who have done this successfully, which lighting conditions were consistent, and which clues did you ignore? I am mainly looking for a method that produces the same answer twice before I start choosing hair or clothing colors from the result.