I'm colourblind (protanopia I believe), the context colouring doesn't appear to work for me. I can use syntax highlighting to snap eyes to the correct pattern

I'm colourblind (protanopia I believe), the context colouring doesn't appear to work for me. I can use syntax highlighting to snap eyes to the correct pattern I'm looking for, I can't really discern the value in large coloured blocks of text though. I can already work out what part of code that is by the rough shape of the block before I even start reading it, why would you need to colour it in?