I opened a PR to get the Groovy color on Github updated to the blue from the logo. See https://github.com/github/linguist/pull/5418
If you would like to see Github use the color from the Groovy logo, please reply with a +1 to this thread and give a thumbs up on this PR -> https://github.com/github/linguist/pull/5418 The plus one on this thread will help show community support.
