Red purple and purple red

Quick answer：

The terms 'red purple' and 'purple red' refer to color shades. 'Red purple' is a shade of purple with red tones, often appearing more reddish or warmer. 'Purple red' might be a shade of red with purple tones, appearing more purplish or cooler. These color terms are used in the field of color theory and design to describe the nuances and variations of colors.