Since the last Microsoft Edge Dev channel update (18.104.22.168) was deployed for macOS, colors disappear and are replaced with just black and white text when visiting app.youneedabudget.com.
Before (I've intentionally blurred out certain things):
After this latest update (I've intentionally blurred out certain things):
Is it possible this has to do with the 'night mode' features added in this release?
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+1 on YouTube dark mode on MacOS Mojave.
Fixed in latest Dev Build released July 9, 2019
Thank you for verifying this @dreinidaho.