Hey Tina. You're speaking about the two red colours of the 2 peseta 1955 Franco issue. I'm sorry not to be able to show mint satmps, as I don't collect Spain. But this is the colour catalog image of both versions of the 2 pta stamp:
The left stamp was first issued. Later it was the right one. An image of an actual stamp:
It was done, for the 2 pta stamp, not to be confused with 1 pta of the same issue:
The red 2 pta stamp was in use for a short period of time (hence its catalog value: 35 € mint and 1 € used); while the red-lilac or "red-purple" (as is often refered) has a catalog value of 0.20 €. Its actual value is nile, as bilions of them were issued and used. So, the most likely is that you've the red-lilac stamp.