Thanks. I agree about ColorName*. I’m still not really impressed with the ability of either of those apps to recognise some colours, but I guess that’s down to the camera on my iPhone 13 mini. In good natural light I’m looking at a Post-It that is distinctly yellow, but the camera shows it as more or less white, and the apps respond accordingly. A pity, because I argue with my wife about colours, and questions like “yellow or cream?” are typical. I guess there’s a good reason why proper colour analysis equipment is expensive.
@Simon I’m sorry we may have hijacked your thread. ColorName* says the colours of the charging light on my ancient MacBook Pro are Atomic Tangerine and Electric Green, so this approach works, but it sure is fiddly. I hope you might have found a better one. For this specific issue, I wonder if you could use Shortcuts – which can detect battery status – to send you a notification when charging finishes?