When my son was going through one of his growth spurts as a teenager, his legs would sometimes hurt. I would smile and tell him that he was having growing pains because his feet were developing at a faster rate than his legs, stretching the muscles in odd ways.
It is the same for the traveler on the spiritual path as the auric field begins to shift. A feeling of discomfort is experienced because there is still a resistance or a holding onto old, familiar patterns of conditioning. This unease is aggravated by a swinging back and forth between love and fear that can create quite a bit of suffering in the process. Moreover while the Heart chakra is opening quite naturally and with great ease, the mind is still reminding us to take care and be distrustful of people or life situations that have deceived us in the past.
With practice and awareness, we become more comfortable with a new sense of peace and well being that is taking over. Gratefully, at some point, we realize that all suffering is a prison of our own making. As we break free of the walls around us, we open to the spaciousness of our true Self. And yes, suddenly, there is color everywhere.