The famous best-selling Christian book and movie Heaven Is For Real describes the experiences of Todd Burpo's son, Colton, who had a NDE (Near Death Experience). Therein the young boy describes the spiritual world, the kingdom of God and also the instructions that he had been told by the divine personality, Jesus.
However when asked specifically about God the father, by his own father, the boy exclaimed something extraordinary.
“What does God look like?” I said. “God the Holy Spirit?”Colton furrowed his brow. “Hmm, that’s kind of a hard one . . . he’s kind of blue.” - Heaven Is For Real, Todd Burpo, pg 68