You are going to block this site. This will do the following:
- You will no longer see this site in searches.
- Site will no longer see your site in searches.
- Site will not be able to comment on your site profile.
- Any comments this site has posted to your profile will not be displayed.
Are you sure you want to do this?
The colors of the neocities logo are quite baked here. I recommend using a palette generated to suit your particular image.
I don't know any good command-line tool for doing this, however I do know that mtpaint is excellent for doing this in exactly a way you choose. Multiple palette generation algorithms, multiple dithering algorithms, custom palettes if you prefer, along with otherwise nice facilities for ediiting images.