SAM's range of Red colors comes in a set of 6 7 ml. bottles. There are 6 different shades of red so blending while painting will be easy. if one doesn't work, you have 5 others to help achieve the final color you are going for.
The set includes six 7ml. bottles of each color: Cool Red, Hot Red, Crimson Oxide, Magenta, Red Oxide, and Scarlet.