mathematics-physics-wiki/docs/stylesheets/extra.css

[data-md-color-scheme="slate"] {
  --md-hue: 210; 
  --md-primary-fg-color:        #EE0F0F;
  --md-primary-fg-color--light: #ECB7B7;
  --md-primary-fg-color--dark:  #90030C;
}