I think he sounds gifted.
My son's motor skills were delayed and he couldn't walk until
18 1/2 months and he never crawled but his motor delays did not affect intellectual giftedness.
I thought one of the tests for cognition in my son's developmental assessment at 12 months was not a good test to use on a kid with motor delays. In the test the child has to reach around a barrier to obtain a toy. The testers observed that he wouldn't reach around the barrier to obtain the toy and they put this down in their report as he didn't yet "understand" how to do this. Wouldn't his 6 month old motor skills and muscle weakness make it a just a little more difficult for him to do this than the average 12 month old? Apparently that didn't occur to them. On the test it was listed as a cognitive skill.
My son had difficulty doing jigsaw puzzles and this is listed on a lot of gifted checklists, but kids with motor dyspraxia like my son are not usually good at jigsaw puzzles. I don't think his difficulty has anything to do with what I think of as intellectual giftedness.
I know my son's receptive vocabulary was a lot higher than what he could actually say at 18 months, but I could usually understand him and I knew this was probably not unusual for my son because he had motor delays. Once when he was 14 months old, we were shopping with a relative and she understood him when he ordered some kids to "put that down." They were playing with some things they had taken off the store shelves and he didn't like it. A few months later his words were a little more understandable to other people because he practiced talking so much.
What you said about your son and colors sounds similar to my son at that age. Everything was blue to him for a while too, but when I bribed him with M&Ms if he would say the color words he suddenly started saying the correct color, at least well enough that I could understand him. I think blue or boo was just easier for him to say than the other color words.
My son also had to know what everything was and how it worked and a very young age. We had to get how it works books to read at bedtime. He would take such a long time to do anything because he had to know all about any new thing he encountered on trips to the grocery store, to restaurants, and especially to the restroom if they had different water faucets like the ones that come on automatically without turning a handle. He constantly asked questions and was just a happy inquisitive kid with a great sense of humor and I never cared that he wasn't and will never be physically gifted like his cousins and his sister and just about everyone else in the family.
