I installed the red OEM kit in mine and judging by the diagrams in the installation instructions they look the same. It's hard to say for sure though unless you put both side by side.
There are so many red accents in the Si as well as the colors in the display, I'm not sure the blue would look good. I don't remember seeing anyone else who's done it. Maybe you'll be the first.
I'd suggest looking through the different threads talking about the OEM accent lights. There is a small modification that can be done to make the red ones brighter. They don't throw much light right out of the box.