When you paint, try doing so without any
Adjustments whatsoever. Paint your values exactly as you want them, paint your colours exactly as you want them. When something doesn't look good, figure out why and redo it instead of trying to adjust it. It'll slow you down at first, but it'll give you the practice you need. In the future, with this practice, you won't need to waste time doing adjustments
If you want to do the Greyscale -> colour method, then do it, but then when you need to fix something, flatten the image and paint over it in colour (Normal blending mode) to get the effect your want. Then, you can use an Overlay layer for some additional colour effects to add some more saturation where it's needed.
You can also try working in colour from the start. It's more difficult to keep track of both your colours and values at once, but it's good to know how to do it, and it might help you avoid a lot of the muddiness you have. There are limitations to colourising B&W, so if you want good colours, you will need to do a lot of painting directly in colour, even if you do start with a greyscale underpainting. If you do it already, then I don't think you're picking your colours carefully enough.
Also, you need to work on separating characters from their backgrounds a little more, they often blend into them. Two good examples are in today's posts. Part of it is because all the shading everywhere is so dark.
Yep I do the flatten image-paint over already for awhile ^^ . After reading your post, I realized something...which I think where all my frutrations come from recently lol:
The reason I feel the need to adjust the colors is because I am working on a cintiq - where the colors look fine and when I preview it on my other monitor, the colors are messed up. ;_; (I am working on dual monitors). So tbh, I am not sure which monitor to follow. I think my recent drawings using cintiq is giving me this issue. I don't want to have to buy that color correction software for $$$ in order to get a consistent color on my monitors. I tried adjusting the gamma and all that but yeah, my two monitors are still not identical.
See. These are artworks I made when I still had my wacom tablet. I personally love how the colors turn out (though they may still have the 'shading is too dark' issue).
The one below is drawn/colored with cintiq. Notice how they seem to be more flat. My coloring took quite a bit of a setback here. I do love how the cover turned out but not after tweaking the hell out of the colors. It does look more 2D than my previous works which have more of a semi-realism feel to them. The colors don't seem as complex as my previous works. To this date, I have been wondering what happened. I haven't changed a single thing in my work process:
All my comic pages are drawn/colored using cintiq as well.
I am still frustrated with Cintiq on the coloring aspect to this day. But don't get me wrong, I LOVE how quickly I can draw/paint using cintiq but the color selection process for me has really got me all messed up.
I'll sit down on this again tonight and see if I can play with my monitor settings again. Also the color palette I use in photoshop might need a bit of adjusting because I put in limited colors when I started working on the comic (I got this palette from a comic-coloring tutorial book. I think it's a bad idea now). So yeah that could be the issue as well. I am just realizing how these changes have affected my works so much.
I love you guys <3. Your critiques has really given me a lot of insight. Can't thank you enough. I'll post some updated pics based from your critiques and my little epiphany rambling just now lol.