Hi Britt,
You could be picking up on someones aura without visualizing the actual colors. Just "getting vibes" as you say. You could be a sensitive or have precognitive abilities. We all carry around our own histories accumulated during all our life experiences (this one and past lives). You may see something in peoples eyes, for it is true," The eye are the windows to the soul." A tip for all you ladies out there who wonder what kind of guy you are dating. Take him somewhere where he comes in contact with small children or dogs. Watch how the kids or dogs react to him. They are great indicators on what may lie beneath his exterior. Might I suggest that you perform this little experiment on the first or second date and not wait until after you are married. Best, Jeff