Styling

App Styles

You can change the way NetPad looks by defining your own CSS styles in Settings > Styles.

Customizing Output

Use the .dump-container class to define custom styles

.dump-container {
    font-size: 1.25rem;
}

You can also define your own CSS classes and use them when you Dump() a value:

myObj.Dump(css: "important");

.important {
    background-color: salmon;
}

Theming NetPad

NetPad has 2 themes, Light and Dark. You can override the styles of these themes to make it feel yours. These are all the CSS variables and their values for both themes:

.theme-netpad-dark {
    /* TEXT */
    --text-color: #dcdcdc;
    --text-strong-color: #ffffff;
    --text-hover-color: #ffffff;
    /* BACKGROUND */
    --background-color: #222222;
    --background-lighter-color: #333333;
    --list-background: #282828;
    --form-control-background-color: #333333;
    --form-control-disabled-background-color: #1c1c1c;
    --kbd-background-color: #59646e;
    /* BORDERS */
    --border-color: #3f3f3f;
    --border-contrast-color: #555555;
    /* ACTIONS */
    --hover-color: rgba(255 255 255 / 7.5%);
    --active-color: #0d6efd;
    --action-icon-color: silver;
    --action-icon-hover-color: white;
    /* SHADOWS */
    --box-shadow-bottom: 0 7px 8px -8px rgb(0 0 0 / 36%);
    --box-shadow-bottom-and-sides: 0 0 8px 2px rgb(0 0 0 / 36%);
    /* TITLEBAR */
    --titlebar-background: #1b1c1d;
    /* STATUSBAR */
    --statusbar-background: #1b1c1d;
    /* SCRIPT VIEW */
    --script-toolbar-background: #1e1e1e;
    --find-text-box-background: #1c1c1c;
    /* PANES */
    --pane-ribbon-background: #252525;
    --pane-background: #222222;
    --pane-toolbar-background: #222222;
    /* CONTEXT MENU */
    --context-menu-background: #323232;
    --context-menu-item-hover-background: #15539e;
    /* DIALOG */
    --dialog-background: #222222;
    /* TABS */
    --tab-background: #2d2d2d;
    --tab-active-background: #1e1e1e;
    --tab-active-text-color: #ffffff;
    --tab-inactive-text-color: rgb(255 255 255 / 65%);
    /* SCROLLBARS & SPLITTER */
    --scrollbar-track-color: #343434;
    --scrollbar-thumb-color: #777777;
    --splitter-color: #282828;
}

.theme-netpad-light {
    /* TEXT */
    --text-color: #34314b;
    --text-strong-color: #000000;
    --text-hover-color: #000000;
    /* BACKGROUND */
    --background-color: #f3f3f3;
    --background-lighter-color: #f6f6f6;
    --list-background: #f1f1f1;
    --form-control-background-color: #fafafa;
    --form-control-disabled-background-color: #ececec;
    --kbd-background-color: #212529;
    /* BORDERS */
    --border-color: #cccccc;
    --border-contrast-color: #bfbfbf;
    /* ACTIONS */
    --hover-color: rgb(0 0 0 / 0.75%);
    --active-color: #0d6efd;
    --action-icon-color: #595959;
    --action-icon-hover-color: black;
    /* SHADOWS */
    --box-shadow-bottom: 0 7px 8px -8px rgb(0 0 0 / 16%);
    --box-shadow-bottom-and-sides: 0 0 8px 2px rgb(0 0 0 / 16%);
    /* TITLEBAR */
    --titlebar-background: #dfdfdf;
    /* STATUSBAR */
    --statusbar-background: #e3e3e3;
    /* SCRIPT VIEW */
    --script-toolbar-background: #ffffff;
    --find-text-box-background: #ededed;
    /* PANES */
    --pane-ribbon-background: #efefef;
    --pane-background: #f3f3f3;
    /* CONTEXT MENU */
    --context-menu-background: #f3f3f3;
    --context-menu-item-hover-background: rgb(30 144 255 / 50%);
    /* DIALOG */
    --dialog-background: #f3f3f3;
    /* TABS */
    --tab-background: #ececec;
    --tab-active-background: #ffffff;
    --tab-active-text-color: #000000;
    --tab-inactive-text-color: rgb(0 0 0 / 65%);
    /* SCROLLBARS & SPLITTER */
    --scrollbar-track-color: #cecece;
    --scrollbar-thumb-color: #7e8182;
    --splitter-color: #dcdcdc;
}

To override a variable, define it in your custom styles.

.theme-netpad-dark {
    --active-color: red;
}

Here's an example of customizing the Dark theme using the Dracula color palette (which goes great with the Dracula editor theme):

.theme-netpad-dark {
    --drac-light: #343746;
    --drac-dark: #22222c;

    --text-color: #F8F8F2;
    --background-color: var(--drac-dark);
    --list-background: var(--drac-light);
    --form-control-background-color: #343746;
    --active-color: #dbb5fa;
    --script-toolbar-background: #242632;
    --pane-ribbon-background: var(--drac-light);
    --pane-background: var(--drac-dark);
    --pane-toolbar-background: var(--drac-dark);
    --dialog-background: var(--drac-dark);
    --tab-background: #333541;
    --tab-active-background: #242632;
    --tab-active-text-color: #fffff;
    --scrollbar-thumb-color: #777777;
    --splitter-color: #2b2d39;
}

Finally, you can style pretty much anything in NetPad. If you find something you'd like to style that isn't covered by the pre-defined CSS variables open the Developer Console (CTRL + SHIFT + I), locate the element(s) you'd like to customize and add them to your custom styles!

Note that changes to theme CSS variables and to DOM structure can/will occur in later releases.

Editor Styles

NetPad uses the Monaco editor. You can customize the look and feel of the editor by going to Settings > Editor. There are a number of themes to select from (powered by the monaco-themes project), but you can further customize a selected theme using the themeCustomizations property.

{
    "cursorBlinking": "smooth",
    "lineNumbers": "on",
    "wordWrap": "off",
    "mouseWheelZoom": true,
    "minimap": {
        "enabled": false
    },
    "themeCustomizations": {
        // General editor colors
        "colors": {
          "editor.background": "#282a36"
        },
    
        // Semantic highlighting token styles
        "rules": [
          {
            "token": "interface",
            "foreground": "50fa7b",
            "fontStyle": "underline"
          }
        ]
    }
}

See IColors and ITokenThemeRule for the definition of the colors and rules properties respectively.

The value keys that can be added to the colors property are not all clearly defined by the Monaco project but here are some:

"colors": {
    "editor.foreground": "#f6f8fa",
    "editor.background": "#24292e",
    "editor.selectionBackground": "#4c2889",
    "editor.inactiveSelectionBackground": "#444d56",
    "editor.lineHighlightBackground": "#444d56",
    "editorCursor.foreground": "#ffffff",
    "editorWhitespace.foreground": "#6a737d",
    "editorIndentGuide.background": "#6a737d",
    "editorIndentGuide.activeBackground": "#f6f8fa",
    "editor.selectionHighlightBorder": "#444d56"
}

Token names for use in the rules property are also not clearly defined. However, you can find the ones NetPad uses here.