Update admonition colors for contrast

Author: davepagurek

client/styles/abstracts/_variables.scss

@@ -129,7 +129,7 @@ $themes: (
 
     admonition-border: #22C8ED,
     admonition-background: #E4F8FF,
-    admonition-text: #0E86A1,
+    admonition-text: #075769,
   ),
   dark: (
     logo-color: $p5js-pink,
@@ -227,8 +227,8 @@ $themes: (
     hint-inline-text-color: #cfcfcf,
 
     admonition-border: #22C8ED,
-    admonition-background: #1681b7,
-    admonition-text: #E4F8FF,
+    admonition-background: #105A7F,
+    admonition-text: #FFFFFF,
   ),
   contrast: (
     logo-color: $yellow,
@@ -326,7 +326,7 @@ $themes: (
     hint-inline-text-color: #cfcfcf,
 
     admonition-border: #22C8ED,
-    admonition-background: #1681b7,
+    admonition-background: #000000,
     admonition-text: #ffffff,
   )
 );