How do you know if a World Series ball was made during the same year as the WS printed on the ball?

For example, I have seen 1986 WS balls with different color printings on it.

Which color was made during the actual year of a certain World Series?

I recently started to collect team signed baseballs again....

I found this site here: http://photos.bigleaguebaseballs.com...ies-baseballs/

It looks like when they first started in 1978, which is red, they would alternate each year. Red then blue, till starting in 2000, they have been gold.

Is this correct?