'Red' is one of the most ancient color words in Indo-European — Latin 'ruber,' Greek 'erythros,' Sanskrit 'rudhira.'
Of the colour at the long-wavelength end of the visible spectrum, resembling blood, ripe strawberries, or rubies.
From Old English "rēad" (red, crimson, ruddy), from Proto-Germanic *raudaz (red), from PIE *h₁rewdʰ- (red, ruddy). This is one of the oldest colour terms reconstructable for Proto-Indo-European, and its reflexes are remarkably consistent across the family: Latin "ruber" and "rufus" (red, whence "rubric," "ruby," "russet"), Greek "eruthrós" (red, whence "erythrocyte"), Sanskrit "rudhirá" (red, bloody), Old Irish "rúad" (red), Lithuanian "raũdas" (red, reddish-brown), Old Church Slavonic "rudъ" (red), and Tocharian B "ratre" (red). The PIE root