Migrate color scales and new brand colors

src/tokens/component/avatar.json5

@@ -13,7 +13,7 @@
         },
         'org.primer.overrides': {
           dark: {
-            '$value': '{base.color.neutral.13}',
+            '$value': '{base.color.white}',
             alpha: 0.1
           }
         }

src/tokens/component/avatarStack.json5

@@ -11,6 +11,14 @@
               group: 'component (internal)',
               scopes: ['bgColor'],
             },
+            'org.primer.overrides': {
+              light: '{base.color.neutral.4}',
+              'light-tritanopia': '{base.color.neutral.4}',
+              'light-protanopia-deuteranopia': '{base.color.neutral.4}',
+              'light-high-contrast': '{base.color.neutral.4}',
+              'light-tritanopia-high-contrast': '{base.color.neutral.4}',
+              'light-protanopia-deuteranopia-high-contrast': '{base.color.neutral.4}',
+            },
           },
         },
         muted: {
@@ -22,6 +30,14 @@
               group: 'component (internal)',
               scopes: ['bgColor'],
             },
+            'org.primer.overrides': {
+              light: '{base.color.neutral.3}',
+              'light-tritanopia': '{base.color.neutral.3}',
+              'light-protanopia-deuteranopia': '{base.color.neutral.3}',
+              'light-high-contrast': '{base.color.neutral.3}',
+              'light-tritanopia-high-contrast': '{base.color.neutral.3}',
+              'light-protanopia-deuteranopia-high-contrast': '{base.color.neutral.3}',
+            },
           },
         },
       },