Blend Layers

The most accessible method, by using combination of blend layer types.

This is the least efficient type of filtering, but the most accessible in art programs, as it only requires blend layers.

Start off with monochrome sketch, and on above put in Overlay or Color Dodge layer filled with pure saturated color. In headspace case, blue. You can add a mix and match of more combinations, like adding hints of magenta on the lighter edge.

Sometime when using clip on layer, the filter does not work. This is due to line art layer being transparent. You may need to have a white background for it to work.