Reading the Taylor kit colors?

[AnnaK]

I use a white towel as background. The pH colours especially change depending on whether you have green grass or a blue sky behind them.

[famousdavis]

From Taylor: "Conduct color-matching test in natural daylight or with the aid of a daylight simulator.

WHY? Anyone who has ever walked out of the house wearing two pieces of clothing that looked liked they matched until they got in the daylight knows about this problem. The term for the phenomenon is metamerism. Different light sources make for different colors. If a test is designed to be read in daylight (after all, pools are mostly outdoors!), artificial lighting, i.e. incandescent and fluorescent, will affect your color perception. Sunglasses do too, so take them off."

http://www.taylortechnologies.com/Ch...P?ContentID=69