Fix vertical list background color in testnet

Author: buberdds

src/app/components/VerticalList/index.tsx

@@ -1,10 +1,9 @@
-import { COLORS } from 'styles/theme/colors'
 import { styled } from '@mui/material/styles'
 import Box from '@mui/material/Box'
 
 export const VerticalList = styled(Box)(({ theme }) => ({
   display: 'flex',
   flexDirection: 'column',
   gap: `0 ${theme.spacing(2)}`,
-  backgroundColor: COLORS.brandDark,
+  backgroundColor: theme.palette.background.default,
 }))