1. theme

1-1.make styled.js

export const lightTheme = {
    mainBgColor: 'tomato',
    textColor: '#1e272e',
    accentColor: 'yellow'
}

export const darkTheme = {
    mainBgColor:'#1e272e',
    textColor: '#d2dae2',
    accentColor: 'yellow'
}

1-2. use
in App.js

36번, 47~52번 주의깁게 볼것.

사용!
background-color:${props=> props.theme.mainBgColor}