Herr

"color," Old English hiw "color; form, appearance; species, kind; beauty," earlier heow, hiow, from Proto-Germanic *hiwam (source also of Old Norse hy "bird's down," Swedish hy "skin, complexion," Gothic hiwi "form, appearance"), from PIE *kiwo-, suffixed form of root *kei- (2), a color adjective of broad application (source also of Sanskrit chawi "hide, skin, complexion, color, beauty, splendor," Lithuanian šyvas "white").

A common word in Old English, squeezed into obscurity after c. 1600 by color (n.) but revived 1850s in chemistry and chromatography, often in a distinctive sense in reference to the quality of color other than luminosity and chroma.

Old English har "hoary, gray, venerable, old," the connecting notion being gray hair, from Proto-Germanic *haira (source also of Old Norse harr "gray-haired, old," Old Saxon, Old High German her "distinguished, noble, glorious," German hehr), from PIE *kei- (2), source of color adjectives (see hue (n.1)). German also uses the word as a title of respect, in Herr. Of frost, it is recorded in Old English, perhaps expressing the resemblance of the white feathers of frost to an old man's beard. Used as an attribute of boundary stones in Anglo-Saxon, perhaps in reference to being gray with lichens, hence its appearance in place-names.