Direct answer: Yes. Silicone can be produced in a colour the buyer names, and the catalogue already carries a custom colour listing for the Sea-Doo RXP 325 and RXT 325 intercooler and blow off valve kit. The colour is agreed on the sample, and the approved sample becomes the reference for the bulk run.
A colour name alone is a weak instruction, because a cured silicone surface reads differently from a printed swatch. The practical route is a physical reference: a piece of the existing hose, a sample chip, or the part the new one has to match. That reference travels with the drawing, and the sample is made to it. Colour is one of the points checked at approval, alongside shape and connection size.
The same applies to the other silicone items in the catalogue, such as the formed intake hose and the 325 silicone power filter kit. Where a part mixes silicone and metal, the colour applies to the silicone section and the metal keeps its own finish. A colour change is a new sample, not a note added to an existing order.