https://gitlab.com/sxwpb/minimal-tux-icons
These are only meant to help for cases where the full tux is too detailed to display, see examples in the linked README. But the shape also works well for single fill cases, like in the keychain example. I wouldn’t want these to be used when the full tux could be displayed in all its glory instead.
One issue I have is I do not know how to license these properly, I wouldn’t want them to show up in a trademarked logo or anything, but I would still want them to be freely usable as tux icons anywhere. What do you think?
I think you’re absolutely right… perhaps something with the effect of lighter compared to the rest = open vs darker compared to the rest = closed.
I think it’s also magnified by the fact that we’re comparing to the full color one on the right which has the lighter color for (in my perception) open eyes.