Update Interface colors

Components affected by style guide gray pallete changes
were updated from gray200 to gray100.

Signed-off-by: Dixsie Wolmers <dixsie@ibm.com>
Change-Id: Ib5b2cca55f2c7d1d6be49e8e64a10db6ef5e4524
diff --git a/src/components/AppNavigation/AppNavigation.vue b/src/components/AppNavigation/AppNavigation.vue
index 26ae380..51b586c 100644
--- a/src/components/AppNavigation/AppNavigation.vue
+++ b/src/components/AppNavigation/AppNavigation.vue
@@ -314,7 +314,7 @@
   left: 0;
   z-index: $zindex-fixed;
   overflow-y: auto;
-  background-color: gray('200');
+  background-color: gray('100');
   transform: translateX(-$navigation-width);
   transition: transform $exit-easing--productive $duration--moderate-02;
   @include media-breakpoint-down(md) {