May I suggest that if you go back far enough in history not only the hose would not have had any vivid colors or fancy diamond patterns knitted into them but the wool they were made from would have been the natural colors of the sheep they raised. IE white, gray, browns and black. the dying of these garments came much later The basic dress would not have been the tartans we see today but rather blanket like robes that were used as protection from the elements. I would doubt the kilt sprang into the Highlands, the Lowlands or the borders of England as this area changed control many times over the centuries. I would also suggest that the clan tartans did not come into full use before the 17th to 18th centuries. Sir Walter Scott did a lot to popularize the tartans and assigned tartans from areas to the common names in a given area. Before this time Plaids were more indicative of an areas rather than clan names.
The kilt has evolved from a very early time and even the Scots word "kilt" derives from the Old Norse kjalta, from Norse settlers who wore a similar, pleated garment.
There is no correct or wrong way to wear a kilt and no colors you are forbidden to wear with it. There are no laws stating that the kilt can not be worn in any country that I know of. No laws saying a kilt must have a certain weight or the material a kilt has to be made from wool and nothing else. Some tartans are protected but they are very few.
Would I wear a thousand dollar kilt if I were fishing, camping or hunting in the wilds of British Columbia.. not very likely but I would wear a utility kilt or a less expensive kilt made from some of the newer fabrics. I would defy anyone who told me I was not dressed correctly, even with boots and work socks around my ankles. The kilt kilts has evolved over many centuries and will continue to evolve for many more.
The color of your hose is a personal choice and no one can tell you differently. No country "owns" the kilt!
So enjoy your kilt and wear it as you will.
Let the criticism begin.