http://www.kingsnake.com/boamorphs/

In all fairness the term "pastel" is over used when describing a boa constrictors. Many people call a boa that has vivid colors a pastel (check out boaphiles pastels @ boaphile.com), but it doesn't really make it one. The above link should give U a little more idea what exactly a pastel boa is. A pastel boa has a washout of black in the saddles and side diamonds...here is a picture of my boa which I bought as a pastel, and agree it fits the characteristics of a pastel. Notice the overall washout in black even tho he isn't very colorful.





hope this helps.