typical reflectance curves for red paints

 

saturated "spectrum" red a "spectrum" red contains no blue light, just like a spectral "red" light; they darken toward brown	saturated "blue" red these reds reflect some blue light and darken toward violet
cadmium red light (scarlet)   cadmium red medium (red)   cadmium lithopone red deep   pyrrole red	quinacridone red   quinacridone pyrrolidone
unsaturated "spectrum" red   venetian red   quinacridone maroon	unsaturated "blue" red   perylene maroon