Changing colour of bars in bar charts

[E1cid]

Yes it is possible, you would need to create two lots of the data,
eg
0,0,3,0
2,4,0,2
OG data 2,4,3,2
And then stack the bar chart
Not knowing what dashboard you are using

Chart ui-chart | Node-RED Dashboard 2.0

Color one value in Node-Red Dashboard differently

Not really a quick way, or even that clean, you could stack the bar chart, and use Javascript or Jsonata to create the look, but will not be perfect. e.g. [chrome_screenshot_19 Dec 2023 16_55_25 GMT] [{"id":"fa5f6d3530e9471c","type":"inject","z":"d1395164b4eec73e","name":"","props":[{"p":"payload"},{"p":"ui_control","v":"{\"options\":{\"scales\":{\"xAxes\":[{\"stacked\":true}],\"yAxes\":[{\"stacked\":false}]}}}","vt":"json"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","…