GrayColor(gray color)
|  | ash_gray, ash_grey, charcoal, charcoal_gray, charcoal_grey, dapple-gray, dapple-grey, dappled-gray, dappled-grey, dark-gray, dark-grey, gray, gray-black, gray-white, grayish, grayish-black, grayish-white, grayness, greenish-gray, greenish-grey, grey, grey-black, grey-white, greyish, greyish-black, greyish-white, greyness, iron-gray, iron-grey, olive-gray, olive-grey, oxford-gray, oxford-grey, oxford_gray, oxford_grey, pearl_gray, pearl_grey, red-gray, red-grey, reddish-gray, reddish-grey, silver, silver-gray, silver-grey, silver_gray, silver_grey, silvery-gray, silvery-grey, tattletale_gray, tattletale_grey... |