This will therefore reduce your ink expenditure by 50% when printing your web page. The result is a little gray :) but our planet and your budget are good.

Solution put 50% opacity in media print (css) on your boby page.

Here the print css code to add in your css work or your favorite CMS theme.

Here the print css code to add to your CSS style files of your WordPress :

@media print {

.wp-block-navigation__container:only-child, .wp-block-page-list:only-child {

}

.entry-content {
		font-size: 14pt;
		line-height: 1.6em;
	}
	.entry-title {
		font-size: 16pt;
	}

	body {
		background: #fff none !important;
		color: #000 ;
           opacity: 0.5;
	}
.wp-block-post-title
{
font-size: 16px;
}
	#wrapper {
		clear: both !important;
		display: block !important;
		float: none !important;
		position: relative !important;
	}
.wp-block-post-title {
    box-sizing: border-box;
    word-break: break-word;
font-size:14pt;
}
h1, .headingclass {
font-size: 14px;

}
	#header {
		border-bottom: 2pt solid #000;
		padding-bottom: 18pt;

	}
	#colophon {
		border-top: 2pt solid #000;
	}
	#site-title,
	#site-description {
		float: none;
		line-height: 1.2em;
		margin: 0;
		padding: 0;
font-size: 13pt;
	}
	#site-title {
		font-size: 13pt;
	}
	.entry-content {
		font-size: 13pt;
		line-height: 1.2em;
	}
	.entry-title {
		font-size: 16pt;
	}
	#access,
	#branding img,
	#respond,
	.comment-edit-link,
	.edit-link,
	.navigation,
	.page-link,
	.widget-area {
		display: none !important;
	}
	#container,
	#header,
	#footer {
		margin: 0;
		width: 100%;
	}
	#content,
	.one-column #content {
		margin: 24pt 0 0;
		width: 100%;
	}
	.wp-caption p {
		font-size: 11pt;
	}
	#site-info,
	#site-generator {
		float: none;
		width: auto;
	}
	#colophon {
		width: auto;
	}
	img#wpstats {
		display: none;
	}
	#site-generator a {
		margin: 0;
		padding: 0;
	}
	#entry-author-info {
		border: 1px solid #e7e7e7;
	}
	#main {
		display: inline;
	}
	.home .sticky {
		border: none;
	}
}