Visualization Colors

[charlesdaniels]

We should add a collection of theme colors for use in visualizations, rather than having downstream widget creators hard-code them. Example use cases:

• Drawing a graph where n different distinct colors are needed for n different lines
• Syntax-highlighting code in a text grid

This will allow themes to also control how visualizations and similar types of widgets appear easily, which will help the visual style remain more consistent when using custom themes. This will also make it easier to accommodate colorblind and hard of sight users who may need or want to utilize different color schemes for visualizations.

This has been discussed in the 2020-12-18 and 2021-01-08 meetings.

[charlesdaniels]

Just a thought - we may want to have "active" and "inactive" versions of these colors as well, to show when something is deselected, deactivated, etc.