Version 0.2.1 of package Face-Shift has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Face-Shift describes itself as: ================================= Shift the colour of certain faces ================================= More at https://elpa.gnu.org/packages/face-shift.html ## Summary: This library provides a (global) minor mode to shift the fore- and background colours of all buffers towards a certain hue. Which hue which major mode should take on is described in ## Recent NEWS: [Not available 🙁]