Using a --variablename for the arc color of the Simple Gauge results in black and does not use the color variable name. I’ve checked on other objects and the color variable name does work elsewhere on things like the progress bar.
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Drawing>elements>0>fill>paint also does not accept variable names
In some areas you’ll have to use var(--variablename) for now - it’s on our list to improve.
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Any news here regarding the use of --variablename for arc-color and arc-background?
Does var not work as a workaround? It’s pretty low priority as long as there’s an easy fix like that. If it outright doesn’t work, that’s a somewhat different issue than the one described in this thread.
Tried with the var(–variablename) but didn’t work for me. Using Ignition 8.1.3
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I am having the same problem with the simple gauge in version 8.1.7. It does not accept theme variables regardless of whether you use “var()”.
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Has anyone found a fix/workaround for this? I am still seeing this issue on 8.1.20.
Version 8.1.21 here. Even when using my browser's debugger, I couldn't figure out where the simple gauge number was getting its color from.
My browser (Firefox) couldn't even tell where it was getting the color from. Firefox thought the color was inherited from the body's color, but it wasn't.
A fix would be appreciated. Should I report this on the Feedback site?
version 8.1.23 here, and neither var(--neutral-10) or --neutral-10 work on the simple gauge. The label disappears with any theming variable
Has anyone found a solution for this yet, or is it on the radar of IA to be fixed?
I can't seem to use my css theme variables in the SimpleGauge component. Version 8.1.38.
Also found another thread with the same issue: Perspective Css-Theme-Variable not working on all Controls - Ignition - Inductive Automation Forum
edit: I see [BUG-1512] now, can we see the progress on this somewhere?
For anyone else running into this issue, for now what I did was replace the SimpleGauge component with a RadialBar chart from the KyvisLabs ApexChart Module:
KyvisLabs ApexChart Module - Ignition - Inductive Automation Forum
If anyone else has an easy solution without 3rd party modules, let me know 
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