[ylk]

Let me preface with: I’m neither a web dev nor experienced with accessibility.

Which tools did you use? I’d argue a human probably also won’t review all your alt tags manually or you could just do it yourself, too. If you have lots of them it might make sense to extract them automatically and pipe them to some language model to generate a score for each of them. Then you can review the ones with the worst scores.

It seems to me that https://wave.webaim.org/ does a good job with ensuring contrast is good, etc., as once I followed all the recommendations things are also readable when using Dev Tools to simulate various vision deficiencies.