White is a tough one, I've used Mishimoto hoses in the past and they work great but I don't know if they have white. They have a colored Vacuum hose kit, and a colored coolant hose kit. I've only seen them in red/blue but the fit great and look very clean.
Oh and Welcome to the forums, Lots of people here who are passionate about Subarus and more passionate about helping other drivers. Cheers
13 WRX Hatch - Torqued Performance Stage 1+
Slow is Smooth > Smooth is Fast