Superimposed is the best way to put it.
imagine taking a negative picture of a lavender and placing it over the picture of a hypo. There you have the Peanut butter.
The Peanut Butter characteristics are easly over looked at a glance. The black on a hypo is black. the black on a Peanut butter is a lavender color. Take a close look at the scales and you will see.
In other words you have more melanin on a hypo than a Peanut butter where the black is concerned.
Oh and the Peanut butter gene has been doing some pretty tricky things.
In this pic you will see a Phantom, 2 Peabino's and a Golden Peanut butter. All are from the same clucth.

*Phantom = Pb x anery homoz
*Peabino= PB x lavender homoz (hybono version instead with the PB gene)
*Golden PB = flame looking hypo in the pic. This was a surprise. This is a PB but none like I have ever seen. i produced three of these and they all look alike. Somehow the PB gene when outcrossed does some pretyy weird things. I think this snake looks like a flame hypo now to most but it will turn/change into something quite different as it matures.
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"Yeah ya told me, and ya wrote it down too. But how the hell am I supposed to remember!"