Hi Francois,
Thanks so much for reaching out!
1. I'm glad your team is trying out Emphasis Animations!
It sounds like you're experiencing a bug that folks were running into where Emphasis-animation triggers could become incomplete after reopening a project file.
We've released a fix in Storyline 360 (Build 3.85.31840.0). I'd recommend double-checking with your team that you are all updated to the most recent version of Storyline 360 in your Articulate 360 desktop app.
2. You also mentioned in your post the use of the Pipette and having difficulty selecting colors in your slide.
Do you currently have the scale settings set to 100% on your computer? You can check this by right-clicking on your desktop and then clicking Display Settings ( when using a Windows Machine).
Looking forward to hearing from you!