Because I distinguish between light blue and blue, I'd keep calling something "light blue" even when people in my extended family who don't speak Russian will start saying "this is green now". Sometimes we have silly arguments about that which is fun.
Another one I like is the color between yellow and green. Russian has the word "salatoviy" (салатовый) translated as "salad green". I always see it that way even when not thinking or speaking Russian and I'd tell people something is "salad green" and they'd respond with "huh? oh you mean yellow..."