How to add background color for header wrapper in custom theme inherit from blank theme

[Aveeva]

I have created a custom theme which is inherited from the blank theme, how to add background color for the header wrapper?

web - css - source

_header.less :

.page-header{ background-color: #000000;}

_extend.less:

@import "_header.less";

Is my practice right?

[Nishu Jindal]

Hi @Aveeva ,

can you try below solution

https://community.magento.com/t5/Magento-2-x-PWA-Theming-Layout/Change-header-panel-background-color...

Hope this helps you! 
Problem Solved! Click Kudos & Accept as Solution!

[Aveeva]

@Nishu Jindal I did exactly the same, still my header color not changing.