From #wikimedia-operations IRC channel:

[15:05:10] <chiborg> hashar zeljkof Our AdvancedSearch browser tests where we check for specific colors are failing since 1-2 weeks (e.g.https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/AdvancedSearch/+/443071/). To mee it looks like a (fixed) bug in the rgb2hex dependency of webdriver io (https://github.com/webdriverio/webdriverio/issues/2773) Could you help us with that, e.g. by updating the rgb2hex in node_modules for browsers tests?
[15:07:29] <zeljkof> chiborg: is there a related phab task?
[15:07:50] <zeljkof> chiborg: so what exactly should I do, update package.json in core?
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[15:30:51] <chiborg> zeljkof There is nor phab task yet, I can create one. Would Continuous-Integration-Infrastructure be the right board? I don't know enough about how the infrastructure works to answer what you should do with confidence. Does package.json have webdriver io as a dependency? then we're out of luck since they did not do a release yet and rgb2hex is listed as its dependency. If it's a top-level dependecy, then it works.
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[15:34:00] <zeljkof> chiborg: please create a task and CC me, I'll take care of tags
[15:34:40] <zeljkof> chiborg: can you reproduce the problem locally, using mediawiki vagrant for example?
[15:34:57] <zeljkof> That would speed up the process significantly
[15:35:51] <chiborg> zeljkof I'll try tomorrow and hold off creating the ticket until then.
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[15:40:25] <zeljkof> chiborg: I have some time now, I'll create a task and test locally, I'll cc you, assuming the same irc and phab usernames
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[15:43:41] <chiborg> zeljkof I'm gabriel-wmde on phab. Please also cc Tonina_WMDE (Tonina Zhelyazkova (WMDE) on phab) and Tim_WMDE (Tim eurlitz WMDE on phab), I just realized i'm not be not around in the next days and they'll be affected.
[15:43:54] <chiborg> zeljkof Thank you!