In my experience there is no such thing as uncolored. I have never heard an amp, preamp, CD player, cable or other component which didn't lend at least a subtle sonic signature to the overall sound of the system it was in.
An often overlooked component in ANY system which is most certainly always colored to some degree or another is the room.
Of course there are components and cables which want to be closer to neutral than others but ultimately they too have an audible sonic signature - which can vary tremendously between different system configurations.
To me, music IS a coloration - it has body, weight, bloom, transparency, liquidity, texture, timbre, air... and what would music sound like if it were simply neutral? Seems boring... doesn't it? Music is comprised of so many opposites its difficult for any system to excel at both. Music is made of color and its the duty of a good system to faithfully reproduce music in all its glory.
What cables do quite effectively is balance a system with the environment to produce a sound which the listener can determine (based upon his/her preference & experience) as being more like REAL music.
It is much easier to balance a system with cables than it is to balance with excessive room treatment or various system components...it is ridiculous to expect that anyone's system is perfect. No two components make a perfect match in every case and it is less likely that any complete system is in-fact, perfect. Even in cases where someone uses components from one manufacturer they remain subject to what the manufacturer deems as the "correct" sound...which is never truly "neutral". Anyone in this hobby could tell you that every component manufacturer has their own idea of what music should sound like, hence their sonic signature - which is never truly neutral and in most cases never like REAL music on their own.
It takes the right seasoning to make any component sound its best.
Here is another question to ponder; what would food taste like if it was neutral? Yuck! We all like flavor don't we? But.. we all have different tastes.
I think its important that Electrostaticman understand the possibilities that await him and that he not limit himself to the solutions that worked for us. Of course we can provide guidance but none of us have his ears.
Electrostaticman, its my suggestion that you select one of the above mentioned cables and start your journey there. A world of possibilities await you. If your first cable doesn't suit you, sell it and try another. Every cable you experience will deliver a new vision into your system. It can be a difficult process but the end results are very rewarding.