@kwat_505's post on Artfol

Guys I have so many wips and I hate coloring, you got any tips to make coloring faster/more enjoyable
Also how to render if u can
Jun 6, 2021
#question
#arthelp
#advice
Comments
separate a new layer for color. Select the space of the lineart with magic wand, polygon, magnetic, brush selection, pick your poison, and expand a few pixel out to prevent gaps. fill in with color. I personally go with quick flats and focus more on lighting/shading
for faster, I use the lasso fill tool (paint bucket is ok but I have a lot of gaps and sketchy lines in my doodles so lasso fill is quicker than bucket fill) it's made me start coloring my doodles again cuz it's so quick
I like to use bucket or section tools when colouring, they speed up the process a lot :)

You could also collab with another artist to allow them to color your art, and you both take credit for the piece!
Shade first and color after, it creates a interesting effect during the proccess. Also bucket fill the heck out of it if there is too much stuff to be colored. This will save your wrist a lot of pain