Maybe its a lighting issue, but all the reds look orange to me, or just way too bright in general to match the other keys in the set.
Is RBV the darkest?
That is one flaw with all modern Photography is color accuracy, this is regardless of film or digital formats.
Under various lighting conditions, variations in film and paper in film photography or file format, digital camera architecture and even color accuracy of your computer screen and if it is a LCD or CRT. There are all factors that will effect colors.
Under incandescent light things will get a orange tint, blueish tine under florescent light, very slight (very faint) yellow in natural sun light. Getting pure white light is difficult at best, the closes you can go is matching natural sun light.
That is why color matching and selection for things such as paints and even keycaps are done with color samples.
For Key caps, pieces of plastic in the colors available are used to try to select colors as you have seen in various photos on Geek hack.