Remove pub static.

give pub/static 777 permission

clear cache.

and run php bin/magento setup:static-content:deploy

you will see new css.

NOTE:give proper folder and file permission.

I hope this will help you.

1. Remove pub static.
2. Give pub/static 777 permission
3. Clear cache.
4. Run: php bin/magento setup:static-content:deploy

You will see new css.

NOTE:

I hope this will help you.