How to get pure black (in CMYK terms) from Styler (APP)

Hi folks--

We have a customer who would like the black in their PDF output to be pure black (in CMYK terms, all K, i.e. 0,0,0,100%). By default, black is rendered as composite black (a combination of all CMYK colors).

I have found how to change it for particular contexts via APP source edits, but I'm hoping someone can point me to a more direct way to configure APP to always map "black" to CMYK: 0,0,0,100). Is there a way to redefine the color "black" and/or the default color in a single place in the stylesheet, either directly in Styler or via APP source edits? Ideally this would also apply to things like table borders and header/footer rule elements.

Thanks.

--Clay