I'm going to go on record that I personally despise the color cons25. One of the first things I have to do on stupid linux is turn it off. et tu FreeBSD?
That hasn't changed in several pfSense versions. It's been around since the 1.2.3 days. Though the console settings have changed recently and that may have made it show up in cases when it may not have otherwise.
One can always configure their terminal program to strip colors, too…