Local telescope fans try to keep me away from the racks of aerosol-spray paints at hardware stores, but they never succeed. My telescopes' colors have included:
o White.
o White with black trim.
o White with Vixen/Takahashi-green trim.
o White with bronze trim (paint, not metal).
o White with a purple finder. I had a friend who ran a cosmetics business, from her I got reasonable quantities of various odd-color nail-polish enamels to use as paint.
o White / gray with splotches of orange and black applied camouflage-pattern style. This was to make it difficult to fence if anybody stole it, or perhaps too ugly to steal in the first place.
o Black.
o Black with vast numbers of green glow-in-the-dark stars stuck on to cover up nicks in the paint.
o Metallic silver -- a Newtonian tube covered with shiny film.
o Brass. A "decorative" 80 mm f/11 that came in a brass tube. It had quite good optics, so I set up as an ersatz amateur-sized telescope built in the 1800s.
o Red and gray -- the tube and other parts of a 12.5-inch Dobson-mounted Newtonian
o Fluorescent red -- I refinished a NexStar 8 at the time "Classic Coke" was a big thing in commercials. Didn't bother to make stencils for the label.
o Fluorescent red/orange with black trim -- that was Refractor Red, of course.
o Pearlescent pink with gold trim (again, just paint).
o Celestron orange.
o A blue/green color about half way between lime and teal.
o Brandon blue.
o Meade dark blue.
o Questar blue, and let's not talk about the dew shield.
o And fifty shades of gray ... well, maybe not quite that many.
But I have never had a yellow telescope. My telescopes are all very brave.
Clear and multi-colored sky to you all ...