diff --git a/packages/core/package.json b/packages/core/package.json
index 3175ae9b..53b65512 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -80,6 +80,7 @@
     "@styled-icons/fluentui-system-regular": "10.47.0",
     "@styled-icons/heroicons-outline": "10.47.0",
     "@styled-icons/material": "10.47.0",
+    "@styled-icons/material-outlined": "10.47.0",
     "@styled-icons/material-rounded": "10.47.0",
     "@styled-icons/remix-editor": "10.46.0",
     "@styled-icons/simple-icons": "10.46.0",
diff --git a/packages/core/src/components/common/alert/Alert.tsx b/packages/core/src/components/common/alert/Alert.tsx
index 628a8d7d..22d56140 100644
--- a/packages/core/src/components/common/alert/Alert.tsx
+++ b/packages/core/src/components/common/alert/Alert.tsx
@@ -1,14 +1,10 @@
-import Button from '@mui/material/Button';
-import Dialog from '@mui/material/Dialog';
-import DialogActions from '@mui/material/DialogActions';
-import DialogContent from '@mui/material/DialogContent';
-import DialogContentText from '@mui/material/DialogContentText';
-import DialogTitle from '@mui/material/DialogTitle';
 import React, { useCallback, useMemo, useState } from 'react';
 import { translate } from 'react-polyglot';
 
 import AlertEvent from '@staticcms/core/lib/util/events/AlertEvent';
 import { useWindowEvent } from '@staticcms/core/lib/util/window.util';
+import Button from '../button/Button';
+import Modal from '../modal/Modal';
 
 import type { TranslateProps } from 'react-polyglot';
 
@@ -68,24 +64,51 @@ const AlertDialog = ({ t }: TranslateProps) => {
   }
 
   return (
-    <div>
-      <Dialog
-        open
-        onClose={handleClose}
-        aria-labelledby="alert-dialog-title"
-        aria-describedby="alert-dialog-description"
+    <Modal
+      open
+      onClose={handleClose}
+      className="
+        w-[50%]
+        min-w-[300px]
+        max-w-[600px]
+      "
+      aria-labelledby="alert-dialog-title"
+      aria-describedby="alert-dialog-description"
+    >
+      <div
+        className="
+          px-6
+          py-4
+          text-xl
+          bold
+        "
       >
-        <DialogTitle id="alert-dialog-title">{title}</DialogTitle>
-        <DialogContent>
-          <DialogContentText id="alert-dialog-description">{body}</DialogContentText>
-        </DialogContent>
-        <DialogActions>
-          <Button onClick={handleClose} variant="contained" color={color}>
-            {okay}
-          </Button>
-        </DialogActions>
-      </Dialog>
-    </div>
+        {title}
+      </div>
+      <div
+        className="
+          px-6
+          pb-4
+          text-sm
+          text-slate-500
+          dark:text-slate-400
+        "
+      >
+        {body}
+      </div>
+      <div
+        className="
+          p-2
+          flex
+          justify-end
+          gap-2
+        "
+      >
+        <Button onClick={handleClose} variant="contained" color={color}>
+          {okay}
+        </Button>
+      </div>
+    </Modal>
   );
 };
 
diff --git a/packages/core/src/components/common/confirm/Confirm.tsx b/packages/core/src/components/common/confirm/Confirm.tsx
index 5cec8bfd..85fa9770 100644
--- a/packages/core/src/components/common/confirm/Confirm.tsx
+++ b/packages/core/src/components/common/confirm/Confirm.tsx
@@ -84,8 +84,9 @@ const ConfirmDialog = ({ t }: TranslateProps) => {
       open
       onClose={handleCancel}
       className="
-        w-[540px]
-
+        w-[50%]
+        min-w-[300px]
+        max-w-[600px]
       "
       aria-labelledby="confirm-dialog-title"
       aria-describedby="confirm-dialog-description"
diff --git a/packages/core/src/components/snackbar/SnackbarAlert.tsx b/packages/core/src/components/snackbar/SnackbarAlert.tsx
new file mode 100644
index 00000000..e8827586
--- /dev/null
+++ b/packages/core/src/components/snackbar/SnackbarAlert.tsx
@@ -0,0 +1,137 @@
+import { Info as InfoIcon } from '@styled-icons/material-outlined/Info';
+import { Close as CloseIcon } from '@styled-icons/material/Close';
+import { ErrorOutline as ErrorOutlineIcon } from '@styled-icons/material/ErrorOutline';
+import { TaskAlt as TaskAltIcon } from '@styled-icons/material/TaskAlt';
+import { WarningAmber as WarningAmberIcon } from '@styled-icons/material/WarningAmber';
+import React, { forwardRef, useMemo } from 'react';
+
+import classNames from '@staticcms/core/lib/util/classNames.util';
+import IconButton from '../common/button/IconButton';
+
+import type { TranslatedProps } from '@staticcms/core/interface';
+import type { SnackbarMessage } from '@staticcms/core/store/slices/snackbars';
+
+interface SnackbarAlertProps {
+  data: SnackbarMessage;
+  onClose: () => void;
+}
+
+const SnackbarAlert = forwardRef<HTMLDivElement, TranslatedProps<SnackbarAlertProps>>(
+  ({ data, onClose, t }, ref) => {
+    const { type, message } = data;
+
+    const renderedMessage = useMemo(() => {
+      if (typeof message === 'string') {
+        return message;
+      }
+
+      const { key, options } = message;
+      return t(key, options);
+    }, [message, t]);
+
+    const icon = useMemo(() => {
+      switch (type) {
+        case 'error':
+          return <ErrorOutlineIcon className="w-4 h-4" />;
+        case 'success':
+          return <TaskAltIcon className="w-4 h-4" />;
+        case 'warning':
+          return <WarningAmberIcon className="w-4 h-4" />;
+        default:
+          return <InfoIcon className="w-4 h-4" />;
+      }
+    }, [type]);
+
+    return (
+      <div
+        id="toast-default"
+        className="
+          flex
+          items-center
+          w-full
+          max-w-xs
+          gap-3
+          py-2
+          px-2.5
+          text-gray-500
+          bg-white
+          rounded-lg
+          shadow
+          dark:text-gray-300
+          dark:bg-gray-800
+          dark:shadow-lg
+        "
+        role="alert"
+        ref={ref}
+      >
+        <div
+          className={classNames(
+            `
+              inline-flex
+              items-center
+              justify-center
+              flex-shrink-0
+              w-7
+              h-7
+              rounded-lg
+            `,
+            type === 'error' &&
+              `
+                bg-red-500
+                text-red-100
+                dark:bg-red-600
+                dark:text-red-200
+              `,
+            type === 'success' &&
+              `
+                bg-green-500
+                text-green-100
+                dark:bg-green-600
+                dark:text-green-200
+              `,
+            type === 'warning' &&
+              `
+                bg-yellow-500
+                text-yellow-100
+                dark:bg-yellow-600
+                dark:text-yellow-200
+              `,
+            type === 'info' &&
+              `
+                text-blue-500
+                bg-blue-100
+                dark:bg-blue-800
+                dark:text-blue-200
+              `,
+          )}
+        >
+          {icon}
+        </div>
+        <div
+          className="
+            text-sm
+            font-normal
+          "
+        >
+          {renderedMessage}
+        </div>
+        <IconButton
+          aria-label="Close"
+          variant="text"
+          color="secondary"
+          onClick={onClose}
+          className="
+            ml-2
+          "
+        >
+          <span className="sr-only">Close</span>
+          <CloseIcon className="w-4 h-4" />
+        </IconButton>
+      </div>
+    );
+  },
+);
+
+SnackbarAlert.displayName = 'SnackbarAlert';
+
+export default SnackbarAlert;
diff --git a/packages/core/src/components/snackbar/Snackbars.tsx b/packages/core/src/components/snackbar/Snackbars.tsx
index b0836473..71ff5bee 100644
--- a/packages/core/src/components/snackbar/Snackbars.tsx
+++ b/packages/core/src/components/snackbar/Snackbars.tsx
@@ -1,21 +1,16 @@
-import { Close as CloseIcon } from '@styled-icons/material/Close';
-import Alert from '@mui/material/Alert';
-import IconButton from '@mui/material/IconButton';
 import Snackbar from '@mui/material/Snackbar';
 import React, { useCallback, useEffect, useState } from 'react';
 import { translate } from 'react-polyglot';
 
 import { useAppDispatch, useAppSelector } from '@staticcms/core/store/hooks';
 import { removeSnackbarById, selectSnackbars } from '@staticcms/core/store/slices/snackbars';
+import SnackbarAlert from './SnackbarAlert';
 
-import type { TranslatedProps } from '@staticcms/core/interface';
 import type { SnackbarMessage } from '@staticcms/core/store/slices/snackbars';
-import type { SyntheticEvent } from 'react';
+import type { FC, SyntheticEvent } from 'react';
+import type { TranslateProps } from 'react-polyglot';
 
-// eslint-disable-next-line @typescript-eslint/no-empty-interface
-interface SnackbarsProps {}
-
-const Snackbars = ({ t }: TranslatedProps<SnackbarsProps>) => {
+const Snackbars: FC<TranslateProps> = ({ t }) => {
   const [open, setOpen] = useState(false);
   const [messageInfo, setMessageInfo] = useState<SnackbarMessage | undefined>(undefined);
 
@@ -47,42 +42,17 @@ const Snackbars = ({ t }: TranslatedProps<SnackbarsProps>) => {
     setMessageInfo(undefined);
   };
 
-  const renderAlert = useCallback(
-    (data: SnackbarMessage) => {
-      const { type, message } = data;
-
-      let renderedMessage: string;
-      if (typeof message === 'string') {
-        renderedMessage = message;
-      } else {
-        const { key, options } = message;
-        renderedMessage = t(key, options);
-      }
-
-      return (
-        <Alert key="message" onClose={handleClose} severity={type} sx={{ width: '100%' }}>
-          {renderedMessage}
-        </Alert>
-      );
-    },
-    [handleClose, t],
-  );
-
   return (
     <Snackbar
       key={messageInfo ? messageInfo.id : undefined}
       open={open}
-      autoHideDuration={6000}
+      autoHideDuration={600000}
       onClose={handleClose}
       TransitionProps={{ onExited: handleExited }}
       anchorOrigin={{ vertical: 'bottom', horizontal: 'right' }}
-      action={
-        <IconButton aria-label="close" color="inherit" sx={{ p: 0.5 }} onClick={handleClose}>
-          <CloseIcon className="h-5 w-5" />
-        </IconButton>
-      }
+      className="test"
     >
-      {messageInfo ? renderAlert(messageInfo) : undefined}
+      {messageInfo ? <SnackbarAlert data={messageInfo} onClose={handleClose} t={t} /> : undefined}
     </Snackbar>
   );
 };
diff --git a/packages/core/src/styles/main.css b/packages/core/src/styles/main.css
index 3f5a0652..056e0ac7 100644
--- a/packages/core/src/styles/main.css
+++ b/packages/core/src/styles/main.css
@@ -170,8 +170,8 @@
   .btn-contained-success {
     @apply border
       border-transparent
-      bg-green-700
-      hover:bg-green-800
+      bg-green-600
+      hover:bg-green-700
       text-white
       disabled:text-gray-50
       disabled:bg-gray-300/80
@@ -219,8 +219,8 @@
   .btn-contained-error {
     @apply border
       border-transparent
-      bg-red-700
-      hover:bg-red-800
+      bg-red-600
+      hover:bg-red-700
       text-white
       disabled:text-gray-50
       disabled:bg-gray-300/80
diff --git a/yarn.lock b/yarn.lock
index 50b34980..ff46e8f1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3700,6 +3700,14 @@
     "@babel/runtime" "^7.20.7"
     "@styled-icons/styled-icon" "^10.7.0"
 
+"@styled-icons/material-outlined@10.47.0":
+  version "10.47.0"
+  resolved "https://registry.yarnpkg.com/@styled-icons/material-outlined/-/material-outlined-10.47.0.tgz#d799a14c1cbbd4d730d046d9f791f108e907fd34"
+  integrity sha512-/QeDSGXlfRoIsgx4g4Hb//xhsucD4mJJsNPk/e1XzckxkNG+YHCIjbAHzDwxwNfSCJYcTDcOp2SZcoS7iyNGlw==
+  dependencies:
+    "@babel/runtime" "^7.20.7"
+    "@styled-icons/styled-icon" "^10.7.0"
+
 "@styled-icons/material-rounded@10.47.0":
   version "10.47.0"
   resolved "https://registry.yarnpkg.com/@styled-icons/material-rounded/-/material-rounded-10.47.0.tgz#c2a9e8277ba88949caffe08d42360d7aa45afaa8"