RGBW Disable color picker

[ThaDuck]

Is it possible to disable to color picker for RGBW modules?
I want to use a Fibaro RGBW module to control 2 dimmable LED lights, and if I am able to connect 1 to the R(ed) and B(lue) channel and change the brightness for those channels I will be able to get it working.

I already have a RGBW module with a LED strip in place, but that shows a (good working) color picker. And I see no options to turn that to slider bars by example.