rutilance

noun

1. (rare, uncountable, usually)redness; a red glow; the quality of being rutilant

   “1918-22, James Joyce, Ulysses […] rolled it into a thin cylinder, ignited it in the candleflame, applied it when ignited to the apex of the cone till the latter reached the stage of rutilance […]”

   “He used vegetal colorings for his works, thus, obtaining the rutilances of Van Dyck and that of Van Der Goss.”