Explore visual techniques for on-hover effects

[eqbech]

For the on-hover effects in line plots, we change the color of the selected line. Currently this color is set by using the next color in the plot_config. Instead we should use a completely different color than what exists in the color palette.

[berland]

Since we are using a discrete color palette that is optimized to be as distinct as possible while also being accessible to the most dominant types of colour blindness, there is no other colour to choose.

We would have to pick one of the colours in the existing palette if so, and avoid using that colour elsewhere, or use some other effect for highlighting

[eilskra]

@berland could we use black/grey scale? Black is already assigned to history for summary data, so maybe ensembles shouldn't be able to have this color anyway?

[berland]

Yes, in the Okabe-Ito palette, black could be used for this.

[andreas-el]

This was discussed during a meeting to determine a natural next step.
The outcome was to try to:

• Make sure that the hovered line is drawn as before (possibly higher z-index)
• Add a white veil underneath to assert focus to the hovered line

We should expect some screenshots or functional branch that would allow us to evaluate the effect of this.