app.scss

// app.scss 
// see https://bootstrap.themes.guide/how-to-customize-bootstrap.html
/* import the necessary Bootstrap files, file-links adjusted by UG ! */ 
// @import "bootstrap/functions"; 
@import "../../node_modules/bootstrap-scss/functions"; 
// @import "bootstrap/variables"; 
@import "../../node_modules/bootstrap-scss/variables";
// $theme-colors: map-remove($theme-colors, "primary", "danger"); 
// Then add additional custom code here

$thdblue: #1a4273; $thddarkgrey: #6f6f6e; $thdgrey: #a8a8a8; $thdlightgrey: #dadada; $green: rgb(91, 227, 0); // for tests
$theme-colors: ( 
    "primary": $thdblue, 
    "danger": rgb(231, 61, 85)
    );

//$body-bg: $green;

/* finally, import Bootstrap to set the changes! */ 
@import "../../node_modules/bootstrap-scss/bootstrap";