Also related to #84, to further enhance letter discrimination, allow users to customize label fgnd/bkgnd colors

[gwiede]

Title pretty much says it all, would be neat if users could customize label/target coloration for foreground and background.

I searched through the obvious documentation, but if such customizations mentioned in #84, #85, or this existed, I couldn't discover what their json keys were to do so.

Thanks very much for such an excellent package!!

[metasong]

would touch it quickly, so glad you like it, i would put more effort on it