layout: post

platform: js

control: General Topics

documentation: ug

Essential [Theme Studio](http://js.syncfusion.com/themestudio/) for JavaScript allows us to build a new theme based on an existing themes for Syncfusion Essential JavaScript controls except Data visualization controls like Chart, Diagram, Gauge, Range Navigator, Barcode, Maps. Also, you can import your customized theme into the Theme studio and customize the colors and download.

You can apply Flat-Azure theme as shown below,

**Step 2:**

* Miscellaneous

**Step 3:**

Essential Theme Studio for JavaScript provides a `Filter` option to customize theme for the specific controls. In this, you can filter the Dialog control and customize theme of it.

You can find the filter option in theme studio as shown below:

**Step 4:**

Once you customize the theme for the Dialog control, then you can download the customized theme files directly through the `Download` option in theme studio.

You can find the Download option in theme studio as shown below:

Downloaded theme file is in the below structure:

You can refer these customized unminified/minified theme files to display the Dialog control in your application.

You can find the import option in theme studio as shown below:

**Step 2:**

Import **properties.json** file which is customized theme of Dialog control earlier as shown below:

**Step 3:**

You can display the Dialog control which is applied the customized theme of Dialog control by importing the properties.json file.

Now, you can customize the Dialog control with your desired theme as shown below:

**Step 4:**

After customizing theme, you can export or download the customized theme files.

Once download the customized theme from the theme studio, you can find the customized unminified/minified theme files in the downloaded folder as like below structure.

Refer these customized unminified/minified theme files into your application. The below section explains what are all the files required to refer and the steps to apply the customized theme in your application.

Downloaded theme file is in the below structure:

How to use the generated CSS in your web application?

**Step 1:**

* Using these compatibility theme files, you can render both EJ1 and EJ2 components in a single page

* Downloaded theme with compatibility file is in the below structure

* You can find the customized unminified/minified theme compatibility files in the downloaded folder as like below structure.

For more information, Please refer to the [Compatibility](https://help.syncfusion.com/js/compatibility) Section.

You can find the customized theme less files in the downloaded folder under below location.

You can choose any compiler which is available in local/online to generate the CSS from LESS such as dotless compiler, less2css etc. The below section explains how to generate the CSS from LESS using less2css compiler.

**npm install -g less**

**Step 2:**

** For example: lessc ej.theme.less output.css **

**Step 4:**

This will generate the CSS file with the given name “output.css”.

You can manually edit the color code variables in this less (ej.theme.less) file to add more styling and compiled to CSS files.