Is there a legal regulation shade of yellow for road markings?
There are specifications, not regulations. There’s even a specifiation for the shade of white the white lines need to be painted. There are specifications as to the width, spacing and distance of all raod markings, all road humps and all street furniture. However, if your question is: can I claim the yellow line was invalidated by a failure to adhere to these specifications, then no, you can’t.
