I don't think the blue was a standard color. Most I have seen are a grey. I used Rustoleum Hammered grey. In regards to wiring it is fairly simple. It does not route through the ignition switch. It goes from a direct power source to the switch to the hot side of the heater motor. The original switches are almost impossible to find but after market ones that clamp to the under side of the dash are readily available. If you need to convert to 12v here is a replacement 12v motor that fits the existing housing. I think I reused the existing fan and maybe had to cut the length of the shaft. The motor is reversible.
AutoZone. Part #35512. Everco. Heater blower motorOriginal switch on eBay but expensive
Original switch for referenceClassicParts
