Add support CSS variables

docs/pages/experiments/material-ui/svg-icon.tsx

@@ -0,0 +1,81 @@
+import * as React from 'react';
+import {
+  Experimental_CssVarsProvider as CssVarsProvider,
+  useColorScheme,
+} from '@mui/material/styles';
+import { pink } from '@mui/material/colors';
+import CssBaseline from '@mui/material/CssBaseline';
+import Box from '@mui/material/Box';
+import Button from '@mui/material/Button';
+import Container from '@mui/material/Container';
+import SvgIcon, { SvgIconProps } from '@mui/material/SvgIcon';
+import Moon from '@mui/icons-material/DarkMode';
+import Sun from '@mui/icons-material/LightMode';
+
+const ColorSchemePicker = () => {
+  const { mode, setMode } = useColorScheme();
+  const [mounted, setMounted] = React.useState(false);
+  React.useEffect(() => {
+    setMounted(true);
+  }, []);
+  if (!mounted) {
+    return null;
+  }
+
+  return (
+    <Button
+      variant="outlined"
+      onClick={() => {
+        if (mode === 'light') {
+          setMode('dark');
+        } else {
+          setMode('light');
+        }
+      }}
+    >
+      {mode === 'light' ? <Moon /> : <Sun />}
+    </Button>
+  );
+};
+
+function HomeIcon(props: SvgIconProps) {
+  return (
+    <SvgIcon {...props}>
+      <path d="M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8z" />
+    </SvgIcon>
+  );
+}
+
+export default function CssVarsTemplate() {
+  return (
+    <CssVarsProvider>
+      <CssBaseline />
+      <Container sx={{ my: 5 }}>
+        <Box sx={{ pb: 2 }}>
+          <ColorSchemePicker />
+        </Box>
+        <Box
+          sx={{
+            display: 'grid',
+            gridTemplateColumns: 'repeat(auto-fill, minmax(256px, 1fr))',
+            gridAutoRows: 'minmax(160px, auto)',
+            gap: 2,
+            '& > div': {
+              placeSelf: 'center',
+            },
+          }}
+        >
+          <Box>
+            <HomeIcon />
+            <HomeIcon color="primary" />
+            <HomeIcon color="secondary" />
+            <HomeIcon color="success" />
+            <HomeIcon color="action" />
+            <HomeIcon color="disabled" />
+            <HomeIcon sx={{ color: pink[500] }} />
+          </Box>
+        </Box>
+      </Container>
+    </CssVarsProvider>
+  );
+}

packages/mui-material/src/SvgIcon/SvgIcon.js

@@ -51,10 +51,10 @@ const SvgIconRoot = styled('svg', {
   }[ownerState.fontSize],
   // TODO v5 deprecate, v6 remove for sx
   color:
-    theme.palette?.[ownerState.color]?.main ??
+    (theme.vars || theme).palette?.[ownerState.color]?.main ??
     {
-      action: theme.palette?.action?.active,
-      disabled: theme.palette?.action?.disabled,
+      action: (theme.vars || theme).palette?.action?.active,
+      disabled: (theme.vars || theme).palette?.action?.disabled,
       inherit: undefined,
     }[ownerState.color],
 }));