I'm afraid I don't know what you mean any more. I believe we're talking about the same thing - the player's own HP and resource (mana, energy, etc) bars, directly underneath their skills.
It's not really a matter of telling the difference between the colors of HP and energy bars -- it's a matter of telling the difference between 100% and 50% on either bar. HP, mana, etc, only need to contrast with their backgrounds, so I can tell how much I'm missing.
As for telling the two resources apart, that's just a matter of location. They could both be blue and I wouldn't care, as long as HP is always on top and mana is always below it.
I personally cannot see red at all. While many people would be confused as to why colorblind mode then helps me, you've got it right: red vs blue contrasts better than blue vs purple, so I can tell them apart. Blue and purple look exactly the same to me, where as red vs blue translates to more of a gray vs blue for me.