I would like to build a 'wheathermap'like map in Zabbix.
For this to work, I need to indicate network load on links using colours.

Currently, It is possible to change the format (line type, colour) of a link using trigger statuses however, this will greatly increase the number of triggers in Zabbix for the sole pupose of making pretty maps.
Therefor, I think it would be a good idea to be able to use a mapping based on item values, for instance:

0% - Black
1-10% - Purple
10-20% - Cyan
30-40 % - Blue
50-60 % - Yellow
70-80 % - Orange
80-100 % - Red

I would like to be able to define these mapping globally, just like value mappings so we can reuse them easily in other maps or on other links in the same map.