In short and simple terms, the word "yang" refers to the masculine or positive energy in the concept of yin and yang. It represents attributes like light, heat, activity, and strength.
Facial cues that indicate an excess of yang energy include red and / or inflamed skin. (mindbodygreen.com)
The «white hats» (the good guys that help develop and implement solutions) and «black hats» (cyber criminals) have a relationship not unlike yin yang in Chinese philosophy. (fortune.com)