diff --git a/src/viewport-three/viewport-host.ts b/src/viewport-three/viewport-host.ts
index e5f2ff4e..f9d112a7 100644
--- a/src/viewport-three/viewport-host.ts
+++ b/src/viewport-three/viewport-host.ts
@@ -495,6 +495,8 @@ const TERRAIN_BRUSH_PREVIEW_LOWER_COLOR = 0xe17b75;
 const TERRAIN_BRUSH_PREVIEW_SMOOTH_COLOR = 0x7dbbf1;
 const TERRAIN_BRUSH_PREVIEW_FLATTEN_COLOR = 0xf1d37d;
 const TERRAIN_BRUSH_PREVIEW_PAINT_COLOR = 0x8eb9ff;
+const TERRAIN_BRUSH_PREVIEW_FOLIAGE_PAINT_COLOR = 0x65d36e;
+const TERRAIN_BRUSH_PREVIEW_FOLIAGE_ERASE_COLOR = 0xf0a853;
 const TERRAIN_BRUSH_PREVIEW_OFFSET = 0.05;
 const BOX_CREATE_PREVIEW_FILL = 0x89b6ff;
 const BOX_CREATE_PREVIEW_EDGE = 0xf3be8f;