coloring row by isbn

I hope this thread is the right one for my question:
I want to color #isbn by their numbers:
When isbn begins with 978 -> red
When isbn begins with 979 -> blue
any other isbn (starting with 0* to <978) -> green
Example
I have tried with "contains 978" , but when an isbn contains whereever that 978, coloring is wrong.
So what i am missing is a kind of "begins with"
Is there any way to achieve that in a resonable way?
I tried with regex too, but didnt work too.