Feature request: better support for changing text color in markdown

[lumberbot-app]

I use Jupyter notebooks for class assignments and frequently add comments in the graded versions I send back. The use of color seems to be the best way to distinguish my comments from the original markdown text provided by the students. As far as I can tell at least, the only way to change text color in markdown is using HTML tags, like

<font color=red>My comments.</font>

This works, but it's annoyingly verbose when I need to repeat this numerous times in each of dozens of assignments. I would love to see much shorter tags to delimit color changes and/or a way to modify text color by highlighting a section and choosing a color option.

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Originally opened as jupyter/jupyter_core#189 by @gpetty, migration requested by @blink1073

[lumberbot-app]

@jasongrout commented: > I would love to see much shorter tags to delimit color changes

I don't think we are open to changing the markdown format language

way to modify text color by highlighting a section and choosing a color option.

That sounds like an excellent idea!

In JupyterLab, there has also been discussion of a GUI for markdown editing. For example: https://github.com/jupytercalpoly/jupyterlab-richtext-mode

[lumberbot-app]

@kevin-bates commented: This issue is misfiled and belongs in the Jupyter Lab repo (or something with frontend-based intentions).

Could someone with appropriate permissions please migrate this? (@jasongrout, @blink1073, @afshin perhaps?)

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