Module:Message box/fmbox.css

 /* {{pp|small=y}} */
 .fmbox{
 clear:both;
 margin:0.2em0;
 width:100%;
 border:1pxsolid#a2a9b1;
 background-color:var(--background-color-interactive-subtle,#f8f9fa);
 box-sizing:border-box;
 color:var(--color-base,#202122);
 }

 .fmbox-warning{
 border:1pxsolid#bb7070;/* Dark pink */
 background-color:#ffdbdb;/* Pink */
 }

 .fmbox-editnotice{
 background-color:transparent;
 }

 .fmbox.mbox-text{
 border:none;
 /* @noflip */
 padding:0.25em0.9em;
 width:100%;
 }

 .fmbox.mbox-image{
 border:none;
 /* @noflip */
 padding:2px02px0.9em;
 text-align:center;
 }

 .fmbox.mbox-imageright{
 border:none;
 /* @noflip */
 padding:2px0.9em2px0;
 text-align:center;
 }

 .fmbox.mbox-invalid-type{
 text-align:center;
 }


 @mediascreen{
 html.skin-theme-clientpref-night.fmbox-warning{
 background-color:#300;/* Reddish, same hue/saturation as light */
 }
 }


 @mediascreenand(prefers-color-scheme:dark){
 html.skin-theme-clientpref-os.fmbox-warning{
 background-color:#300;/* Reddish, same hue/saturation as light */
 }
 }