Confused about building patch cable

I wonder if someone with experience in building his own patch cable could give some advice, please?

I had to move my router and in connection with that redo some cabling for the LAN. I read this article explaining that for a router to PC connection, I needed a crossed cable - not a straight through one. I.e. one with a T568A in one end and a T568B in the other end.

However, that didn't work. There was no connection.

I then examined the cables I had bought and used previously with pre-fixed connectors. I noticed they were straight through cables with identical connectors at both ends.

So I redid my own build to be a straight thorugh and that worked - I think. At least I now have a connection through.

What I'm unsure about now is if I just read some BS advice or if I'm still mistaken about something?

Looking at my router (NetGear) I see that the indicator for the new connection is yellow in stead of the usual green. Does this mean there is an error on the connection?

There doesn't seem to be any collisions and internet speed is the same as before.

i just use cat6 cable :/

Incorrect, you need to choose A or B for both ends and stick to that standard. You dont need a crossover cable.

OK, thanks.

Any idea why the router gives a yellow light on that connection instead of green?

It usually colors according to what speed the port is doing. Often times 100megabit is yellow and Gigabit is green.