Change the border color

[AIMPED]

This is due to default margins of your browser, see also:

Basic app layout, why can I see a margin in my browser?

Hi there, I have a pretty basic question. Lets take this example: import dash from dash import html app = dash.Dash(__name__) app.layout = html.Div( [ html.Div( 'navbar', style={ 'background-color': 'red', 'height': '10vh', 'margin': '0', 'padding': '0' }, ), html.Div( 'content1', style={ 'background-color': 'blue', …