In "Touch Blue", Maxey Brooke is not quite fair to the writers of the Bible by attributing to them a measure of color-blindness for never mentioning that the sky is blue. To begin with, he asserts that the sky is mentioned more than 400 times in the Bible when in fact the word "sky" or "skies" appears only eleven times. More common (and undoubtedly what he had in mind) is "heaven". However, this word in its Biblical usage usually connotes a realm -- the abode of God or of the souls of the faithful departed -- rather than a canopy over the earth, and hence would have no color.
Eckler, Faith W.
Word Ways: Vol. 13
, Article 19.
Available at: https://digitalcommons.butler.edu/wordways/vol13/iss4/19