@media prefers-color-scheme

.day   { background: #eee; color: black; }
.night { background: #333; color: white; }

@media (prefers-color-scheme: dark) {
  .day.dark-scheme   { background:  #333; color: white; }
  .night.dark-scheme { background: black; color:  #ddd; }
}

@media (prefers-color-scheme: light) {
  .day.light-scheme   { background: white; color:  #555; }
  .night.light-scheme { background:  #eee; color: black; }
}

.day, .night {
  display: inline-block;
  padding: 1em;
  width: 7em;
  height: 2em;
  vertical-align: middle;
}

Source: developer.mozilla.org

Similar codes

70 votes244 views4 answers
Css remove scrollbars
CSS
1 vote215 views2 answers
Antd css
CSS
41 votes201 views3 answers
Centre align in position absolute
CSS
20 votes209 views5 answers
Postgres version command
CSS
2 votes198 views5 answers
Figma
CSS
0 vote205 views1 answer
Dropright css
CSS
36 votes218 views6 answers
Css gradient
CSS
1 vote189 views2 answers
Centrer verticalement css
CSS
23 votes216 views5 answers
Center div using flex
CSS
1 vote214 views1 answer
Use a local font css
CSS