Code and Method to Make the Entire WordPress Website Gray

To express the deep condolences of people of all ethnic groups across the country for the martyrs and deceased compatriots in the fight against the COVID-19 pandemic, the State Council has decided to hold a national mourning activity on April 4, 2020. During this period, national flags will be flown at half-mast across the country and at Chinese embassies and consulates abroad, and all public entertainment activities will be suspended nationwide. Starting from 10:00 on April 4, people across the country will observe three minutes of silence, while cars, trains, ships sound their horns, and air defense sirens wail. As website administrators, we can also remove the color from our websites, turning the entire site gray to pay tribute to the heroes and express our grief. The method to make a WordPress website gray is very simple: click the site's customization button. Then, in the Additional CSS section, paste the following code and publish to see the effect. To revert, simply delete the code after graying out the site.

html{-webkit-filter:grayscale(100%);-moz-filter:grayscale(100%);-ms-filter: grayscale(100%);-o-filter: grayscale(100%);filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);_filter:none}