Or maybe you automatically take that into account by using the ambient light as a reference, I was wondering whether you had tested for that or not?

At the moment I haven't tested. I spent a total of 7 hours with the average of 5 minutes per day on the Anki cards and I seem to be getter better at color distinction.

Every card provides a binary choice. I have cards that present me with two color words and a large circle that's filled with the corresponding color. The difference of the colors is at the beginning stage where I'm still at least a total 32 different hex values. I also have cards that ask for the hex value of the colors.

There were some days were I traveled and used my laptop in other light conditions. They weren't a problem.

For the time in 7 years I created cards to distinguish 4dc636 from 4dc637. That might run into issues with light conditions. I don't know whether it does and whether the human mind is trainable to distinguish colors as finely, but I will find out if I continue spending my 5 minutes every day.

but it might also confound the question of what color "is" this object.

I don't like "is" anyway for the reasons Korzybski layd out.

I want to increase the amount of bits I perceive through the visual channel. It's an open experiment.

The outcome might be that I have color distinction in a few years that allows me to impress people with stunts. I might learn something valuable about colors that can be made into scientific paper or blog post. I also expect that I will get better at usability design even if I don't get superhuman color perception abilities out of the project.

But you are right that having data about the light conditions would be good. I opened a thread on the QS forum about the search for a proper tool.