Nature Power or Prakriti Shakti is a Sanskrit term used in philosophy to denote "power/energy/force of creation." The two words, Nature (prakriti) and Power (Shakti), are sometimes used interchangeably, but when they are put together, they refer to the overall energy that brings nature into being and sustains it.
Why we chose white as color?
Because White is Pure.
White, an inherently positive color, is associated with purity, virginity, innocence, light, goodness, heaven, safety, brilliance, illumination, understanding, cleanliness, faith, beginnings, sterility, spirituality, possibility, humility, sincerity, protection, softness, and perfection.
Kohom Araadhan is done to attain the Divine Power of Nature. The Kohom Araadhan has five elements involved ie. earth (prithvi), water (jal), fire (agni), wind (vaayu) and space (aakash).
Just by the worship or some rituals you cannot achieve it, you need to follow the set principles also and live the life according to them.