Quote from AJJKRN
Just remember the K+ is really acidic so don't pick something just as acidic to mix it with like OJ! If the Pt isn't on a clear liquid diet that is...
Let me make a quick correction. K+ is not
acidic. Remember, acidity is a measure of the amount of protons (H+) dissociated in an aqueous solution. No H+ in K+, or KCl, which is the form in which oral K replacement comes in.
It just tastes awful, that's all.
Back to original question, I was taught no red color because if patient vomits, it can look like hematemesis. I don't know about orange though. I think it's an overkill. KCl is orange (never seen clear one yet.) I wouldn't worry about it. I think the benefit of electrolyte replacement far outweighs the remote risk.