patch: update the design based on new fodydev logo (#10)

This commit update the color scheme to match the new fodydev logo.

Author: pythonbrad

assets/scss/_variables.scss

@@ -6,7 +6,7 @@
     Ubuntu, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
 
   --text-color: var(--black);
-  --black: #000000;
+  --black: #0f1724;
   --white: #ffffff;
   --link-color: var(--primary-600);
   --menu-link-color: var(--black);
@@ -17,11 +17,11 @@
   --container-width: 1200px;
   --content-width: 895px;
 
-  --primary-400: #5aa100;
-  --primary-500: #4d8307;
-  --primary-600: #03856f;
-  --primary-700: #016554;
-  --primary-800: #003c32;
+  --primary-400: #1e8f3e;
+  --primary-500: #1e8f3e;
+  --primary-600: #1e293b;
+  --primary-700: #0f1724;
+  --primary-800: #081219;
 
   --gray-200: #eaecf0;
   --gray-300: #e5e5e5;
@@ -39,3 +39,4 @@
 $desktop-width: calc(1200px + 25px + 25px);
 $min-desktop: 1000px;
 $mobile-max: 999px;
+