Right I wouldn't expect it to be exactly the same, I mean this is just some random diagram online. But let's say, If one was going to get a 3.5 mm jack and want to wire so that when plugged into a 3.5 mm port and have it work, they might want to know a few things, and maybe have the right parts. A four point 3.5 mm jack, when the most common type is 3 section. They could want to know which wire needs to go to which of those sections on that jack. Which location is for the right, left the left and mic the mic. color doesn't change this.
Anyway, this would be how that plug would need to be configured so that it would work. Now your wires may be turquoise, purple, lavender and periwinkle but figuring out which is the common, which is for the left and which is for the right and then were a mic might be added. A diagram like this would let them know where these. Blue, black or yellow, the right earphone wire is still the right earphone wire.
Best wishes.