Yellow is the color that is between orange and green on the color spectrum
That's interesting!  I love yellow flowers, especially roses - they are so pretty!
Yellow is a primary color
I didn't know that!  What else can you tell me about the color yellow?
Sunlight has a yellow color due to the temperatures on the surface of the sun
Cool!  Strange, though, that the sun looks red on a hot day!
Yellow was one of the first colors to be used in art
Wow, you learn something new every day!  There's lots of yellow things in the world, including bananas and the yolk of an egg!
In early christian history yellow was the color associated with the pope