Thank for sparing some time with this. I am trying to switch the color scheme of my map(of main world). However, the integrated color schemes(like"Ovocean","flame")seem cannot work in a proper way.
I just edit the world.txt like this. (Nothing else is changed)

Since I ve previewed the documents about this before, the outcome might be like this:

But it came out to be this:

I am feeling very upset about this, it seems that I have to use the default colorscheme instead.
I have been asking for solutions these days, and try some of them. But they didnt help. Did I got something wrong? or there is some another settings need to adjust?