[Lens][Metric] Metric has strong white border when using dark-mode

[matthiasledergerber]

Elastic-Stack: 8.5.1
Seems like the metric has some intensive white bordering. With a lot of data this looks very unclean and noisy. Not sure if it is an new introduced change, but the old version without borders was much cleaner when working with lots of data. I wouldn't make up an issue about something this small, but we've already had independent feedback from our customers about this.

[elasticmachine]

Pinging @elastic/kibana-visualizations @elastic/kibana-visualizations-external (Team:Visualizations)

[stratoula]

@matthiasledergerber thanx for pinging us here. The new metric is still on technical preview but we actually have planned a diiferent color for the dark mode. Check this screenshot and how it will look:

We are going to fix this on 8.6!