The React MUI v5 Card's background features a subtle white hue with a 5% opacity, leaving me curious about its origin

I've noticed a strange styling issue in my code. It seems to be related to a class called 

.css-18bsee0-MuiPaper-root-MuiCard-root
, possibly from MUI's Card or MUI's Paper components. However, I can't find it in my own code.

While trying to override the background with a gradient effect, I noticed that the color didn't match despite using the same hex code ('#424242'). This issue appears in all Card Components, even those that haven't been modified with my gradient.

Could this styling have been triggered somewhere unintentionally? My theme looks fine otherwise.

Any suggestions on how to remove this unexpected styling or incorporate it into my own gradient effect?

Here is a screenshot from Firefox dev tools for reference: https://i.sstatic.net/v3mzD.png

cssreactjsmaterial-ui

Answer №1

Discovered the solution in the documentation: Adjusting opacity for dark mode background

Modify the background opacity according to the elevation in dark mode. This adjustment was made to align better with the Material Design principles. You can undo this change in the theme:

const theme = createTheme({
  components: {
    MuiPaper: {
+     styleOverrides: { root: { backgroundImage: 'unset' } },
    },
  },
});

The suggestion in comment #1 was on the right track, just required some tweaks in implementation...

Answer №2

Customize your style below using the important tag:

.css-18bsee0-MuiPaper-root-MuiCard-root{

     background-image: linear-gradient(rgba(255, 255, 255, 1), rgba(255, 255, 255, 1))!important
}

Answer №3

Make sure to include this property within your component

sx={{
   [`&.MuiCard-root`]: {
      //your customized styles
     borderRadius: "25px" //For instance, altering the border radius from 4px to 25px
   }
}}

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