The logo is not provided as a part of MIT license of offline-plugin[1]. All rights reserved by Arthur Stolyar[2] nekr.fabula@gmail.com. The logo represent offline-plugin project and it is not allowed to use the logo to represent any other projects or forks/copies of offline-plugin.
[1] offline-plugin -- https://github.com/NekR/offline-plugin
[2] Arthur Stolyar -- https://github.com/NekR