I would consider her a pastel based on her overall reduction of black which allows those nice pink and peach tones to shine through along with her orange dorsal markings.
Basically an animal being called a pastel is a matter of opinion unless your animals are from the Boaphile Jeff Ronne who is the creator of Pastel.
Check out this great webpage where he explains pastelism.
Pastelism
Here are a couple quotes that the Boaphile made on this page regarding Pastels...
"However the red or orange does not make any Boa "Pastel". The reduction of black makes Pastels Pastel. The red or orange makes them better but do not define them."
"First, what is a "Pastel"? [...] A Pastel is this: A Boa that has an odd overall wash lacking the normal amount of black and a reduction in black pigmentation in particular throughout the pattern. This is particularly apparent in babies, which have the same kind of washed out pattern as Hypos. The saddles as well as the side blotches have less black than "normal". In fact, often the side blotches have no black whatsoever. That's it, no more no less. Now it is unfortunate that this leaves a lot to interpretation. Identifying Pastels can be and is subjective. It is very much a matter of opinion. There are definitely degrees of "Pastelism". How much Pastelism is required to label an animal "Pastel"? I don't know what measure others may use, but I know what I look for in babies. I look for nearly no black in the side pattern. A very small amount of black can be found but nearly none normally. Sorry this can't be more definitive but it just can't.