Sweden's own take on the color code — a Telia-era standard
that stuck around, so it shows up a lot here. Tube and fiber
position both follow the same 12-color sequence below, but there
are two documented tube-marking schemes: the full cycle, or a
sparse version where only the first two tubes are colored and the
rest are unmarked white (see note below). Note: ducts follow a
completely different 7-color sequence — no relation to the
tube or fiber order, so don't try to cross-reference them.
Color order (tube & fiber):RedBlueWhiteGreenYellowGreyBrownBlackPurpleOrangeAquaPink
Sparse tube scheme:Tube 1 RedTube 2 BlueTube 3–16 White (trace by position, not color)
Duct order (unrelated to tube/fiber):OrangeYellowRedWhiteGreyPurpleBlue