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holoviz
GitHub Repository: holoviz/panel
 Path: blob/main/doc/tutorials/basic/style.md
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Enhance the Style

Let's elevate the appearance of our Panel components using the power of CSS!

By employing CSS, we can finely adjust the look and feel of our wind turbine data apps, ensuring they are visually appealing and user-friendly.

:::{note} To execute the code snippets below, feel free to run them directly in the Panel documentation via the convenient green run button, within a notebook cell, or within a app.py file served with panel serve app.py --dev. :::

Utilize styles

With styles, we can effortlessly style the container of a component.

Give it a try:

import panel as pn

pn.extension()

outer_style = {
    'background': '#f9f9f9',
    'border-radius': '5px',
    'border': '2px solid black',
    'padding': '20px',
    'box-shadow': '5px 5px 5px #bcbcbc',
    'margin': "10px",
}

pn.indicators.Number(
    name="Wind Speed",
    value=8.6,
    format="{value} m/s",
    colors=[(10, "green"), (100, "red")],
    styles=outer_style,
).servable()

Feel free to experiment by adjusting:

  • The border color from black to teal.

  • The padding from 20px to 50px.

Employ stylesheets

While styles beautify the outer container, they don't directly impact the styling of the contents within the component. Here enters stylesheets.

Give this a go:

import panel as pn

pn.extension()

outer_style = {
    'background': '#f9f9f9',
    'border-radius': '5px',
    'border': '2px solid black',
    'padding': '20px',
    'box-shadow': '5px 5px 5px #bcbcbc',
    'margin': "10px",
}

inner_stylesheet = """
div:nth-child(2) {
  background-color: pink;
  border-radius: 5px;
  padding: 10px;
  margin: 10px;
}
"""

pn.indicators.Number(
    name="Wind Speed",
    value=8.6,
    format="{value} m/s",
    colors=[(10, "green"), (100, "red")],
    styles=outer_style,
    stylesheets=[inner_stylesheet]
).servable()

Feel free to play with changing the background-color from pink to lightgray.

:::{tip} For more insights into stylesheets, refer to the Apply CSS how-to guide. :::

Wrapping Up

With CSS, we can refine the style of our Panel components, ensuring they're visually appealing and provide a delightful user experience.

Resources

How-to