diff --git a/packages/opencode/src/cli/cmd/tui/context/theme.tsx b/packages/opencode/src/cli/cmd/tui/context/theme.tsx
index a4a4d876e2b..0cd9ec70245 100644
--- a/packages/opencode/src/cli/cmd/tui/context/theme.tsx
+++ b/packages/opencode/src/cli/cmd/tui/context/theme.tsx
@@ -278,8 +278,8 @@ function generateSystem(colors: TerminalColors, mode: "dark" | "light"): ThemeJs
       text: fg,
       textMuted,
 
-      // Background colors
-      background: bg,
+      // Background colors - use 'none' to inherit terminal defaults and transparency
+      background: "none",
       backgroundPanel: grays[2],
       backgroundElement: grays[3],