Updated colors for table in dark mode (#802)

* Updated colors for dark mode

* Updated type on useTheme

* Fixed code style

* Revert "Fixed code style"

This reverts commit 1969fce9a511e7f1b7390948b7b31ff13d4d9165.

* Changed hook position

packages/theme/src/themes.ts

@@ -60,7 +60,7 @@ export const lightTheme = createTheme({
 export const darkTheme = createTheme({
   type: 'dark',
   background: {
-    default: '#282828',
+    default: '#333333',
   },
   status: {
     ok: '#1db855',
@@ -83,7 +83,7 @@ export const darkTheme = createTheme({
   border: '#E6E6E6',
   textContrast: '#FFFFFF',
   textVerySubtle: '#DDD',
-  textSubtle: '#6E6E6E',
+  textSubtle: '#EEEEEE',
   highlight: '#FFFBCC',
   errorBackground: '#FFEBEE',
   warningBackground: '#F59B23',