All the residues – qualities that you feel pressured ti express verbally but are emotionally hard to release – can be cleared away on the exhaling breath.
These residues have feeling tones – dark red carries the feeling tone of anger and revulsion;
dark black carries anxiety, grasping, and neediness;
and the muddy color carries sluggishness, dullness, and apathy.
Exhale strongly, and reflect on the residues being expelled from your body with the breath.
Tarthang Tulku Rinpoche
The Joy of Being