Hi and welcome. There are a few colour blind people here and they seem to get on OK. Your only real issues would be if attempting a sunburst finish and you were unable to differentiate the colours in the burst, which would make it very difficult to get a smooth transition. But chose the right colours and you'll be fine.
Most of the real effort goes into getting the finish looking good. On some of the kits, like the Tele, the soldering is minimal, so not too much to worry about. Shaping the headstock is normally the most involved bit of woodworking you'll need to do, followed by a lot of sanding. The ES-3, 175-style kit is a lot more complicated than the Tele in both wiring and construction so I'd certainly start with a Tele.