The following information is based on personal observation. It should not be seen as 100% correct, just an attempt to understand TTsKO camo development. Please feel free to make corrections or add additional information.
The earlier Soviet TTsKO pattern uniforms do not appear to have much color variation. TTsKO uniforms issued 1985 to 1990 had green/khaki based colors. There were some slight dye lot variations on uniforms but there is not enough evidence to say, for example, that brown based (or other color variation) TTsKO pattern uniforms were originally issued.
This all changed circa 1991 when uniforms began to show intentional color variations like pink, oxblood, and blue colorations. 1991 is also when you begin seeing new camouflage patterns introduced (like bi-color and VSR). These new patterns and colorations were probably developed during a trial process to find a new camo uniform for the armed services.
Based on history, Russia fields a new camo pattern about every 10 years; starting with the TTsKO in the 1980’s, VSR in the 1990’s, Flora in the 2000’s and the current digital for the 2010’s.
Camouflage variations increased during the early 1990’s, with the break-up of the Soviet Union, as former republics began developing their own, different camouflage pattern uniforms.
It appears that the Ukrainian owned Elephant factories like the Poltava factory and the Sverdlovskaya factory (which may be located in Russia) were very active in developing and exporting new camo patterns and various uniform colorations.
Please check the dates on your uniforms and see if you can find a pre-1991 TTsKO uniform with something other than a green/khaki base color. It would also be interesting to identify the factories that produced the different color variations.