Support continuous legend for Line & Bar & Area Charts

[mia-mifeng]

Provide a general summary of the feature here

Currently for line, bar and area charts, their color legend does not support showing quantitative data. In other words, continuous legend is not supported. See the picture below where the quantitative data is interpreted as nominal in the legend on the right:

🤔 Expected Behavior?

Continuous legend is supported.

💁 Possible Solution

No response

🔦 Context

This feature is needed for migrating the UDD charts to use RSC.
Analysis doc: https://wiki.corp.adobe.com/pages/viewpage.action?spaceKey=AEPLT&title=UDD+Charts+RSC+Migration+Analysis

💻 Examples

No response

🧢 Your Company/Team

Adobe/AEP Reporting Experience