1) Go to settings
2) Type Dark or color and select "turn on dark mode system wide" or "choose your accent color"
3) Select "dark" in the drop down for "Choose you color"
4) Close and reopen The application .
If the background of the chart is still in light mode:
1) Go to Tradingview in your browser, dark mode should be on. If not turn it on.
2) Right click your...
Ctrl + ,
or
Ctrl + Comma
or
Click portrait on top right and select settings
Change the theme from OS settings to Dark mode.
If your candle colors changed and you do not have a template saved to fix it: go to the web app/browser version of trading view, which should be unchanged, and right click the chart. From there go to color theme and select save as. Close...