_quarto-variables-copy-code.scss

// code block colors
$btn-code-copy-color: if(
  variable-exists(text-muted),
  $text-muted,
  if(variable-exists(body-color), $body-color, $gray-900)
) !default;

$btn-code-copy-color-active: if(
  variable-exists(link-color),
  $link-color,
  #0d6efd
) !default;