Customize the Document Viewer Color Scheme

  • 4 minutes to read

Choose a Predefined Color Scheme

The Web Document Viewer uses predefined color schemes to display controls.

Each color scheme consists of nine colors. The following table illustrates the available palettes:




Dark Moon

Soft Blue

Dark Violet

Green Mist


You can click the control’s smart tag and use its Color Scheme property to change the color scheme.

Create a Custom Color Scheme (Use a Demo Application)

Run Demo: Color Scheme Customization View Example: How to Create a Custom Color Scheme for the Web Report Designer and Document Viewer

To create a custom color scheme in the Color Scheme Customization demo, select a base color scheme from the Color Scheme Customization tab’s drop-down menu.

Use the color picker or specify a color value to change a color. Changes are applied instantly.

After you complete customization, click the Save Changes button to download a ZIP archive.

This archive is called {color_scheme}, where {color_scheme} is the applied color scheme’s name (for instance,

The archive includes the following files:

  • reporting.{color_scheme}.custom.css (in this example, reporting.light.custom.css)

    Contains changed styles that define the Document Viewer’s common appearance.

  • devextreme.{color_scheme}.custom.css (in this example, devextreme.light.custom.css)

    Contains changed styles for DevExtreme UI widgets used in the Document Viewer.

  • dx.themebuilder.metadata.json

    Contains metadata that you can use in the Theme Builder to customize DevExtreme widgets.

Click the View Changes button to invoke the Customization Results dialog. This dialog’s tabs list the same changed CSS classes and Theme Builder metadata.

The Reset Changes button resets all the changes.

Once you saved the resulting files, you can apply the created color scheme to your Document Viewer control:

  1. Open an ASP.NET Web Forms application that contains the Document Viewer.

  2. Copy the reporting and DevExtreme CSS files to the Content folder.

  3. Link the reporting and DevExtreme CSS files as shown below:

    <asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
        <link rel="stylesheet" href="Content/devextreme.light.custom.css" type="text/css" />
        <link rel="stylesheet" href="Content/reporting.light.custom.css" type="text/css" /> 
        <dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ColorScheme="light" Height="800px" Width="900px" >

Run the application to see the result.

Create a Custom Color Scheme Manually

You can customize the Document Viewer CSS classes to create a custom color scheme.

1. Customize the DevExtreme CSS Classes

Change the CSS classes for the Web Document Viewer’s internal DevExtreme UI widgets.

Use the DevExtreme Theme Builder to change the colors and save the customization results (in this example, the generic.light.custom.css file for the light color scheme).

Refer to the documentation topic for information on how to use the Theme Builder.

2. Customize the Document Viewer CSS Classes

The following tables list the classes that define the Document Viewer’s common appearance grouped by categories. These classes correspond to colors in the base palettes.























.dxd-back-contrast .dxd-back-highlighted:hover

.dxd-back-contrast .dxd-back-highlighted.dxd-state-active








.dxd-state-active .dxd-icon-fill

.dxd-back-contrast .dxd-state-active .dxd-icon-fill

.dxd-state-active .dxd-text-primary


.dxd-back-contrast .dxd-icon-fill










To apply a Reporting CSS style rather than a DevExtreme style within a color swatch, add the “.dx-designer-viewport “ selector to the style name.

The following code snippet demonstrates how to specify colors for each category (in this example, in the viewer.light.custom.css file):

.dx-designer-viewport .dxd-back-primary {
    background-color: #d9d9f2;

.dx-designer-viewport .dxd-border-primary {
    border-color: #b3b3e6;

.dx-designer-viewport .dxd-icon-fill {
    fill: #4040bf;

.dx-designer-viewport .dxd-text-info {
    color: #333399;

// ...

You can also specify styles for individual Document Viewer elements. Use a browser’s Developer Tools, locate the corresponding UI element in the page markup…

… and declare the assigned CSS class in your CSS file as follows:

// ...

.dx-designer-viewport .dxd-side-panel-tabs-back-color { 
    background-color: #333399; 

3. Apply custom styles to Document Viewer

Open the web page that contains the Document Viewer control and link the DevExtreme (generic.light.custom.css) and Document Viewer (viewer.light.custom.css) CSS files as shown below:

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">

    <link rel="stylesheet" href="generic.light.custom.css" type="text/css" />
    <link rel="stylesheet" href="viewer.light.custom.css" type="text/css" />  

    <dx:ASPxWebDocumentViewer ID="ASPxWebDocumentViewer1" runat="server" ColorScheme="light" Height="800px" Width="900px" >


Upgrade from Previous Versions

You can use dx-swatch CSS selectors to apply predefined styles to your application’s elements. CSS styles with these selectors are applied to the Report Designer/DocumentViewer widgets. Custom color schemes defined in Reporting have no effect.

To resolve the issue, add the .dx-designer-viewport selector prefix to the names of the reporting CSS styles to raise their priority over DevExtreme styles in the color swatch, as in the following sample class definition:

.dx-designer-viewport .dxd-back-primary {
    background-color: #d9d9f2;
.dx-designer-viewport .dxd-back-primary2 {
    background-color: #ececf9;

You can also use our online demo to generate the correct style definitions.