1. Pretend that I wrote the text (hand-painted for a hundred years)

2. Drag to the top of the layer to be covered.

dark reddish purple

3. Change the text layer blending mode to color deepening/linear deepening/

Step 4: Complete

5, white characters can change modes.

Simply change these.

(Black words on white background are linear, and color words on black background are summarized by filtering, which is probably the case, and then the depth of the effect is fine-tuned. )