in Magento 2.3.0 I have followed the above solution but still not loading my css, I have search ran all the commands but still nothing. Please any mistake on my implentation below, I am trying to add custom.css to the luma theme.


<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
        <css src="css/custom.css"/>




  • In your case follow the below answer and update xml with head tags will get you there. peace :) Commented Feb 28, 2019 at 13:43
  • Sorry about that meant to paste the below<?xml version="1.0"?> <!-- /** * Copyright © 2013-2017 Magento, Inc. All rights reserved. * See COPYING.txt for license details. */ --> <page xmlns:xsi="w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <head> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no"/> <css src="Magento_Theme::css/custom.css" /> </head> </page>
    – Local
    Commented Feb 28, 2019 at 13:59
  • It should not be Magento_Theme it must be as below Commented Feb 28, 2019 at 14:01
  • Did that already but doesnt work still
    – Local
    Commented Feb 28, 2019 at 14:05
  • Magento luma will be vendor folder have you created a theme with the same name so Commented Feb 28, 2019 at 14:12

2 Answers 2


Adding CSS in Luma theme is not good practice. Better to create a Custom Theme: https://devdocs.magento.com/guides/v2.3/frontend-dev-guide/themes/theme-create.html

And add CSS as below:

1) Adding custom CSS: add a file under app/design/frontend/VenderName_Theme_name/Magento_Theme/frontend/web/css/custom.css and add one more file to call that app/design/frontend/VenderName_Theme_name/Magento_Theme/layout/default.xml

add below content in the default.xml

<?xml version="1.0"?>                                             
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../vendor/magento/framework/Module/etc/module.xsd">                                                 
  <css src="css/custom.css" />                                   

Hope it helps!


Start adding a default_head_blocks.xml file in the module’s view/frontend/layout folder, For custom CSS for a specific layout, we'll start with default_head_block.xml layout. It will apply to all pages in Magento.

<?xml version="1.0"?> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <css src="Magenest_CustomCss::css/css-module.css"/>

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