From publisher blurb:
Colours of Magic: Red Fifth Edition Update
A Spectrum Shift: Chromatic Arcana Product
In some worlds, Magic may not be seen as a force in and of itself. In some philosophies, magic can not be classed by types of effect, like Evocation, Illusion or Abjuration. Instead, it might be seen as a result of fundamental aspects of arcane metaphysics.
One such theory holds that all magic is a result of the principles of Colour.
Red is the colour of Fire, Power and Light. It manifests heat, energy, motion, brightness and strength. Its influence is simple, beyond morality or even thought: it is the colour that drives forward, empowers and illuminates, and is evoked in all that moves in the universe.
TThose that devote themselves to understanding the Red become scions power, able to evoke vast effects of energy, fire and motion.
Included in this product:
3 new Class options, one for each of Cleric, Sorcerer and Wizard
a reclassification of one eleventh of the spells of the players handbook