It's intended this way, to gain focus on the remaining tasks.

That's unfortunate. :(

If you want to suggest a different color (hex code) I'm fine with changing. However I want to keep it colored slightly different.

Strikout is more expensive for performance (and you cannot read it at all then), hence not used that one

It does have a strikethrough right now. Maybe if you'd like to be certain it's different, italics would be okay.

For a dark theme, perhaps something like #feeb8d or a more dim #f3e3bb

For a light theme the color seems okay, but something like #353549 is easier to see. (maybe it should be a little lighter though). The strikethrough is definitely bad on a light theme.

To understand contrast colors well, I found this website useful: https://webaim.org/resources/contrastchecker/

For a dark theme, perhaps something like #feeb8d or a more dim #f3e3bb

There is e.g. solarized theme, and gruvbox theme. both have yellow-ish background color so not a good idea.

The x is a fairly good indicator that something is completed, but if you'd like to make the line stand out as completed, perhaps it should be replaced by something like an x mark. But this is getting complicated and inappropriate:

Big nope, x is in text, we show x, and no custom symbol. Especially: Emoji is different on OS/vendor basis and we don't wanna break stuff.

For a dark theme, perhaps something like #feeb8d or a more dim #f3e3bb

There is e.g. solarized theme, and gruvbox theme. both have yellow-ish background color so not a good idea.

Are those these?

https://ethanschoonover.com/solarized/ (source)
https://github.com/morhetz/gruvbox

My Markor only has Auto, Dark and Light. How would I try them?

See the second settings category for editor-only colors.

See the second settings category for editor-only colors.

I need my hand held; I really did comb through everything, and I just can't see it.

I don't know what you mean by "settings category". I:

• click the vertical three dots at the top-right
• click 'settings'
• I see Theme under "Essential".

For every other thing (General, Other, etc) I don't see any reference to themes, solarized or gruvbox..

"Other" settings.