I am not sure about the exact date as well. But I know that they have produced more than 200 distinctive colors
Well they sure did expand from the one color.  They now have over 200 varieties
Colors are a lot of fun. My favorite to use in art is green. Nice, did you know that on the visible spectrum Green is the color located between blue and yellow? Yep! And colors are really interesting with how you can mix them to make new colors. Have you ever used Crayola drawing crayons? Those were introduced in 1903 by Binney & Smith I loved to use those. I never thought about how old their company must be until now. And another interesting fact is: The black Staonal Marking Crayon was the first crayon they produced, in 1902 Strange name, but it makes sense that they would start with the darkest color. It probably has the most applications. Well, they started out as a pigment supply company. Then they shifted gears to school and house products, like chalk and crayons That's neat. I wonder when they started introducing new colors like green and blue.
Since the introduction of Crayola drawing crayons by Binney & Smith in 1903, more than two hundred distinctive colors have been produced in a wide variety of assortments.