As long as such 50kB image doesn’t get replaced with 700kB of javascript bundles for coloring code. I mean, if such coloring it's going to be done, it should b

As long as such 50kB image doesn’t get replaced with 700kB of javascript bundles for coloring code. I mean, if such coloring it's going to be done, it should be done with HTML/CSS. For the OP article, for screenreaders perhaps you are sugesting people to use the alt attribute or similar.