I discovered that bug report after our designer noticed at a glance walking behind me (I use Firefox) that the colors on our site were far darker than she intended, somewhere around 2017-2018 (that bug was opened in 2010).
I've left companies because of devs like that. People who just stand in the way of getting the software to do the correct thing. I do not understand what makes these people tick.
I don't think you grok what's happening. Some middle manager sees a shade of red on his screen in a PDF, and the dev is expected to reproduce the content in that shade of red. There are simply too many variables.
Even if you have access to the PDF, the red will often be rendered differently by the browser than it is by the PDF engine.
I've had middle managers tell me to "fix" a web site because the colors looked different on his office CRT than it did on the laptop screen of a person in another building.
trivial to fix
Everything is trivial when someone else has to fix it.
Now if there's 5 drawings with different colors, or asking "what color do you want it?" leads to a 5-week email chain...