Improved contrast ratio in footer to meet WCAG guidelines

Author: squidfunk

Diff for: src/assets/stylesheets/main/_colors.scss

@@ -113,7 +113,7 @@
   // Footer color shades
   --md-footer-fg-color:                hsla(0, 0%, 100%, 1);
   --md-footer-fg-color--light:         hsla(0, 0%, 100%, 0.7);
-  --md-footer-fg-color--lighter:       hsla(0, 0%, 100%, 0.3);
+  --md-footer-fg-color--lighter:       hsla(0, 0%, 100%, 0.4);
   --md-footer-bg-color:                hsla(0, 0%, 0%, 0.87);
   --md-footer-bg-color--dark:          hsla(0, 0%, 0%, 0.32);