Colour blind?

Two of us spent the day with a friend in St Albans.  We went out for a pub meal that was very good except that so many dishes were 'off'.  Either they had been very busy or someone hadn't ordered enough ingredients.
No1 son popped in on my return.  Perfect timing as he connected my new router and the old one is now ready to be recycled. 
 Bit of an EB as I was too busy chatting to take one earlier.