I am development professional who has over 20 years work on accessibility. A very simple fix to this problem is to use differing shapes in tandem with different colors when indicating status. Many people have presented a sensible solution to this issue with a low complexity and short execution time.  However, if you'd prefer something with a standard around it might I suggest ColoraADD developed by Professor Miguel Neiva of the University of Minho. The symbols below would be placed inside your common symbols as either black or white. As they correspond with a typical traffic light symbols should be understood quickly without extra training. There is licensing involved I believe, but it is highly popular and well accepted. by users. This issue affects between 5-10% of your users.

Symbols That Include Colors for Colorblind people (colorblindguide.com)

Please consider impacts to color blind users when implementing features.  At the very least, allow the colors to be overridden to allow those with color blindness to have the same experience as the rest of the team.

Specifically, we are wanting to utilize the WIP feature for columns on a KanBan board.  We've set the min/max, which defaults min as yellow, and max as red for violations.  There is no way to change these colors, which makes this feature unusable for our team.

I totally agree that this needs to be fixed. Does Jira not care about it's customers?

Please....Me, too

Please see this related suggestion on accessibility compliance, added in 2004:
https://jira.atlassian.com/browse/JRACLOUD-5574

I work on a large scientific project with American, Canadian, Japanese, Chinese and Indian constiuents. I and ~10% of our staff are colorblind (especially with red/green deficiency). Please implement a solution which either allows users to change the color scheme for dashboards (e.g., bubble chart) or use a color-blind compliant color scheme . Thank you

This also affects dashboard, e.g. Bubble chart. The colorblind community is around 8% , so capability to change the color code will be nice, or b) use a color that has a color-blind approval.

To Atlassian: please implement the same solution you are using on Jira Server and Data Center for color blind users:

JRASERVER-61773

The cloud equivalent of that issue can be found here here:

JRACLOUD-61773

It's already localized for the alt text and the aria.

Honestly, I'm in favor of the initial workaround in this issue (without having to DO the workaround, that is).  They don't need to add an option or anything, just change the icons so they're different in shape.  (I'm not in favor of the slashed circle for highest priority, but the others I like).  Changing this for everyone would take minimal effort, and wouldn't require any backend changes for new options, etc.

Text would require internationalization and stuff, and could affect layout, so I'm slightly against that.  At this point I'd take anything, however, especially considering the issue has been open since 2009 (if you include JRACLOUD-18684)