I own an e-ink monitor, and the existing greyscale themes I found are not really optimized for it. My guidelines in creating this theme were:
I've found that this theme works well with the One Light UI Theme.
My goals do not include looking good on any monitor that isn't e-ink. If that happens, it will be a happy accident.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.