We took part at the European open in Italy last year.
They had blue goals with a much brighter blue as the blue from the official rules.
All teams liked it, because these goals were much easier to see due to a
greater “color-distance” the the black walls.
Thanks @stiebel, that’s a very nice suggestion! I too could not help but notice that noone wanted to start playing against the blue goal, since it does seem a bit too close to the black wall.
To their defense, the rules only mention the color “blue”, but given all the images, it is no wonder the blue goal ends up being very close to the black wall.
I’ll see what we can do about this but it is very likely something like this will make it to the rules.