Visually problematic color palette

[kayD]

The color palette is problematic imho.

The problem may be more or less apparent depending on your eyes, but also depending on different monitors.
While I am not color blind, and I have a good quality monitor (for photography), I find it very difficult to discern the reddish colors.

https://zlant.github.io/parking-lanes/#19/49.78873/9.93285

Even with unfolded legend:

The Peterplatz left side seems to be pinkish (residents), while in the Bergmeistergasse it looks between no-stopping, not applicable and residents.

Also here

the parking lot area has a hue I cannot find in the legend. The next similar would be no stopping.
This is partially due to the transparency of the rendering and mixing with the gray underneath.

Suggestion:
The colors should be well separated, without being a random swatch of colors.
Green should be "free"/no payment, blue for payment, and red-yellow for "not allowed" in general.

"Fire red" for absolutely no standing like a fire lane, red for no stopping, yellow for loading only (which also seems for this use-case equal to no parking).

So, "for customers" will be likely not somewhere that you could choose for a trip into the city, so should be somewhere between green and red, avoiding the above used colors, so maybe a dark yellow, i.e. brown?

"private" parking lots are missing (see #150), they could be even darker than customers (maybe brown-black?)

Free parking should clearly be the brightest green (the one that is currently used for customers). All restrictions (time limit, customers only) should tend to a darker, or more blueish, or reddish color.

The "not applicable" is unclear (possibly a tagging error) - it should have the most "smells funny" color: glaring pink. (Maybe dotted or so to indicate a data problem)

[natrius]

I tried to find something for that problem. While researching i found this article https://storytellingmitdaten.com/die-richtige-verwendung-von-farben-in-datenvisualisierungen/ that suggests that no more than 6 colours should be user because above that it gets hard to distinguish. But you have 6 - so i tried where its possible to choose 9 colours https://colorbrewer2.org/#type=qualitative&scheme=Set1&n=9 and it looks easy to distinguish in my opinion.

Might be worth using that?