Here my "AddCurrentColor" Plugin for SvgTools:
Description:
This Plugin for SvgTools replaces the color value of fill/stroke attributes for all icon elements with "currentColor"
If no fill or stroke attribute is present for an element it will be added.
Attention! This should only be used with monochrome black or white SVG-files. Multicolor files would be reduced to use only one color which will destroy the appearance of them most of the time.
With very large files and/or a large number of files it can take a long time to finish.
Instruction:
Install the plugin and use the command AddCurrentColor as external command for the post-processing option.