Hi @miro and welcome to the Quick Community!
The highcharts feature in QuickSight is more of a ‘basic package’ version, therefore some of the highchart features/options are not available within QuickSight’s version. To the best of my understanding, the fade/blur feature is not a native feature in QuickSight’s version so this may not be achievable.
In terms of a work around; you can test out various code functions to see if they are operational (unfortunately there’s no list of functions that are valid) but as mentioned, this may not be available within QuickSight; maybe something like the following could work:
Hi @miro,
Totally agree about the documentation; definitely makes it a bit tougher to test things out without it!
I’ll do my best to send the request through to the support team in hopes that this could be a future addition, similar to the way it’s setup for functions when building a calculated field.