Index: lams_central/web/css/bootstrap/_functions.scss
===================================================================
diff -u -rb7c92dbcfdb0469dbc0144190a201757f398e529 -ra90d0744dd0d09d1b04869e61ce1b66bf1ee3242
--- lams_central/web/css/bootstrap/_functions.scss	(.../_functions.scss)	(revision b7c92dbcfdb0469dbc0144190a201757f398e529)
+++ lams_central/web/css/bootstrap/_functions.scss	(.../_functions.scss)	(revision a90d0744dd0d09d1b04869e61ce1b66bf1ee3242)
@@ -109,7 +109,7 @@
 // Replace `$search` with `$replace` in `$string`
 // Used on our SVG icon backgrounds for custom forms.
 //
-// @author Hugo Giraudel
+// @author Kitty Giraudel
 // @param {String} $string - Initial string
 // @param {String} $search - Substring to replace
 // @param {String} $replace ('') - New value
@@ -177,9 +177,9 @@
   @return if($l1 > $l2, divide($l1 + .05, $l2 + .05), divide($l2 + .05, $l1 + .05));
 }
 
-// Return WCAG2.0 relative luminance
-// See https://www.w3.org/WAI/GL/wiki/Relative_luminance
-// See https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests
+// Return WCAG2.1 relative luminance
+// See https://www.w3.org/TR/WCAG/#dfn-relative-luminance
+// See https://www.w3.org/TR/WCAG/#dfn-contrast-ratio
 @function luminance($color) {
   $rgb: (
     "r": red($color),
@@ -198,7 +198,7 @@
 // Return opaque color
 // opaque(#fff, rgba(0, 0, 0, .5)) => #808080
 @function opaque($background, $foreground) {
-  @return mix(rgba($foreground, 1), $background, opacity($foreground) * 100);
+  @return mix(rgba($foreground, 1), $background, opacity($foreground) * 100%);
 }
 
 // scss-docs-start color-functions