useTheme() hook is not returning palette colors

Duplicates

• I have searched the existing issues

Latest version

• I have tested the latest version

Current behavior 😯

`const theme = useTheme();

console.log(theme.palette); // => {mode: 'light'}`

Expected behavior 🤔

`const theme = useTheme();

console.log(theme.palette); // => {mode: 'light', primary: { ... }, secondary: { ... }, ... }`

Steps to reproduce 🕹

No response

Context 🔦

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Your environment 🌎

@emotion/react: ^11.9.0 => 11.9.0
@emotion/styled: ^11.8.1 => 11.8.1
@mui/base:  5.0.0-alpha.81
@mui/icons-material:  5.6.2
@mui/lab: 5.0.0-alpha.74 => 5.0.0-alpha.74
@mui/material: ^5.8.0 => 5.8.0
@mui/private-theming:  5.6.2
@mui/styled-engine:  5.6.1
@mui/styles:  5.6.2
@mui/system:  5.6.4
@mui/types:  7.1.3
@mui/utils:  5.6.1
@types/react:  18.0.9
react: ^18.1.0 => 18.1.0
react-dom: ^18.1.0 => 18.1.0