I am going to share this at work! The only thing I would have to add is to not include "an image of" at the start. Maybe thats just a bad habbit at my work. Like, the screenreader knows it's an image gang xD
When it comes to alt text, you don’t *have* to describe anything exactly perfectly, just do your best. But it’s good to keep in mind that blindness encompasses many different kinds of visual impairment not just total darkness, some blind ppl have not been blind their whole lives, and the description can also help those who aren’t blind but may need other assistance in understanding the image. And many who have never seen color still have frames of reference for color symbolism picked up from years of social context. Do not assume the reader won’t understand color.