chromaLuma plugin

Has anyone had any success using the chromaLuma plugin?

We're having a devil of a time getting it to work - or even figuring out how to convert RGB color space into YCbCr HEX code.

I have already looked into all of these tips:

https://brightsign.zendesk.com/hc/en-us/community/posts/209963477-Understanding-roVideoPlayer-SetKeyingValue?input_string=chromaLuma%20plugin

Cheers,
Monica