You could help them associate colors with common objects. You could also describe the colors at the blue end of the spectrum as cool and soothing, while explaining that the colors at the red end of the spectrum are generally thought of as warm and invigorating (indeed when you get into the infrared portion of the spectrum you're dealing with radiant heat). You might also compare light wavelengths to musical pitch and explain that the lower notes would correspond to longer wavelengths of light (warmer colors).
I have 2 sons who are legally blind & completely color blind and colors are not important to them beyond matching clothes. Instead they look at other attributes like tactile sensation. Think of an apple - you can say its red or look closer and see dots on it. Which is more interesting?
You couldn't describe the real thing, just through comparison, just as prophets did, introduced a world to people who had never seen it. Be sure when we go there, it will be a WHOLE lot different than what we think now.
I don't believe it's possible. I've had two blind friends but both had lost their sight in their teens, or later.
Peter O'Donnell who wrote the Modesty Blaise series had a unique way of "seeing" through a blind person's eyes. His character would describe somebody as "sounding like the ocean smells", or "feeling like Scotch tastes". He used the other senses to substitute for sight. Neither of my friends would have related to that.
Incidentally one of the two died of altitude sickness in the Himalayas while training to climb Mount Everest. He wanted to be the first blind man to make the climb. He was the most extraordinary man I've ever met and I wrote about him on my blog.