Bright lights on colors
When an object is Red, we mean that it only reflects the portion of the electromagnetic spectrum representing this color, about 650nm.



For a red object, we generally consider that only the color red is reflected, like the XKCD-like diagram below.



Source: 


Color and Color Vision
Quora




EDIT:

This is a wavelength-intensity graph for various colored objects (anodised aluminum to be exact). The intensity is maximum for the wavelength associated with the color we see, but it still can reflect other colors, although at a much lower intensity as well.



Source:


Chen, Yuting, et al. "On the generation of interferometric colors in high purity and technical grade aluminum: an alternative green process for metal finishing industry." Electrochimica Acta 174 (2015): 672-681.