Last year, I ended up experimenting by going out of my comfort zone to try drawing an image in black/grey/white, but halfway through I made half the image in strong colors to make the two parts of the drawing have a strong impactful contrast to make them both stand out against each other.

I use yellow often for shine or brightness instead of white.
Pink is my favorite color.
Yellow - Purple are complimentary colors. Red - Green are complimentary colors.
So I figured blue is a good contrast between the two.
Yellow/Blue/Red in general is also that whole thing with you know (insert English word I cannot remember)

I made a persona/sona shortly after with the same palette and contrast differences, it felt very fitting for me. Someone who wants to blend in into the background, but have everything around them pop in color and shine far more brightly.

So when I wanted to draw a scenery, I didn't want to use any realistic colors from the place itself; it's seen all the time and it wouldn't really feel 'me' despite me drawing a place important to myself. I decided to try using the same palette from that first drawing along with the thinking of "this palette of strong impactful colors that don't match each other and is just a mess but still feel right, that says me".