I am in the middle of a time constrained project and out of one color of yarn. I am weaving towels to donate to a fund raiser for my children's school, so being late is not an option. The project is 3 colors of 8/2 cotton in the warp (white/black/white/teal) and the same repetion in the weft. I am now out of white(poor planning) and it is backordered. I have enough 8/2 cotolin in the same color, manufactured by the same company. Do I dare substitute? I would appreciate any input.