在dash的下拉列表中更改文本输入的字体颜色

import dash
import dash_html_components as html
import dash_core_components as dcc

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Dropdown(
        id='my-dropdown',
        options=[
            {'label': 'Option 1', 'value': 'option1'},
            {'label': 'Option 2', 'value': 'option2'},
            {'label': 'Option 3', 'value': 'option3'}
        ],
        value='option1'
    ),
    html.Div(id='output')
])

if __name__ == '__main__':
    app.run_server(debug=True)

@app.callback(
    dash.dependencies.Output('output', 'children'),
    [dash.dependencies.Input('my-dropdown', 'value')]
)
def update_output(value):
    return 'You have selected "{}"'.format(value)

@app.callback(
    dash.dependencies.Output('my-dropdown', 'style'),
    [dash.dependencies.Input('my-dropdown', 'value')]
)
def update_dropdown_style(value):
    return {'color': 'red'}  # 更改字体颜色为红色

if __name__ == '__main__':
    app.run_server(debug=True)