The answer is not a concrete yes or no; it is a matter of belief and practice.
Sometimes looking indirectly at a person or object may lead to seeing something which some may consider an aura, while others will consider it a visual effect of the person being somewhat out of focus, or being on the edge of our binocular vision, leading to some parallax distortion.
The brain will notice what it is trained to notice, especially in the course of deliberately looking.
The haze, field, or whatever, around an object will be more noticeable the more a person pays attention to it.
Some detractors in the belief of seeing auras believe that seeing different colors can be a matter of the conscious mind's attempt at seeing something which is not there, firing off at a non-stimulus until something fits, while some say it could be mild synesthesia experienced with the above-mentioned visual anomalies.
Though there may be a scientific or medical explanation, it does not mean there is no more, or that perception may not be extended through psychic development.
If you want to learn more about seeing auras, there are a lot of great guides for getting started. Explore it for yourself, and see where it goes for you.