diff --git a/internal/ui/ui_js.go b/internal/ui/ui_js.go
index 512a91a03..c9622986d 100644
--- a/internal/ui/ui_js.go
+++ b/internal/ui/ui_js.go
@@ -58,6 +58,7 @@ func init() {
 	canvas.Set("width", 16)
 	canvas.Set("height", 16)
 	doc.Get("body").Call("appendChild", canvas)
+	doc.Get("body").Get("style").Set("backgroundColor", "#000")
 	webglContext, err := webgl.NewContext(canvas, &webgl.ContextAttributes{
 		Alpha:              true,
 		PremultipliedAlpha: true,