Try selecting print preference to black and white. Then no color ink will be used.
I always use b&w when printing same. Change to color only when printing color. The tech walked me through defining b&w so that it only pulls from b&w. Supposedly b&w printing can pull from color (cyan) for a more 'robust' b&w according to one of the techs. However, she was not all that familiar with the product, so I don't believe much of what she told me. And she couldn't explain why all of my colors are now at 10% or 0% except yellow which still shows at 10%. And she wasn't able to tell me how to have the printer pull only from b&w...said I had an old driver...NOT.
I plan on purchasing some 3rd party color carts and we'll see what happens. Based on the number I've printed in the last year (~950), the color carts should last me several years.