extra.css

[data-md-color-scheme="default"] {
  --md-primary-fg-color:        #ff5522;
  --md-accent-fg-color:         #332f95;
}

[data-md-color-scheme="slate"] {
  --md-primary-fg-color:        #ff5522;
  --md-primary-bg-color:        #2e303d;
}