I know I am not the only one who has had their post randomly appear in light orange instead of black, and it's not because orange is the new black. I haven't yet been able to pin down all of the variables, but what I have seen is that sometimes the forum software automatically adds paragraph ( <p> HTML tags to the beginning and end of a post. I believe this happens more when posting from mobile platforms, but again I haven't been able to do a full battery of tests.
I don't understand why that should change text color, but manually editing the post in HTML mode to remove the paragraph tags shows that is the clear culprit. I think the simplest way to fix this is to adjust the forum software to stop inserting those breaks, or if they are for some reason needed in the from-scratch fully-custom software, to replace the paragraph break with a line break ( <br> .