diff --git a/Makefile b/Makefile
index ebaa680..74131e1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,8 @@
+THEME=neutral
+BACKGROUND_COLOR=\\\#333333
+
+MMDC_BASE_CMD=mmdc --theme $(THEME) --backgroundColor $(BACKGROUND_COLOR) --puppeteerConfigFile ./puppeteer-config.json
+
 .PHONY: All
 All: build/de.png build/de.svg build/en.png build/en.svg
 
@@ -7,8 +12,8 @@ clean:
 
 build/%.svg: %.mmd
 	@mkdir -p $(@D)
-	mmdc -i $< -o $@ -p ./puppeteer-config.json
+	$(MMDC_BASE_CMD) -i $< -o $@
 
 build/%.png: %.mmd
 	@mkdir -p $(@D)
-	mmdc -i $< -o $@ -w 2000 -p ./puppeteer-config.json
+	$(MMDC_BASE_CMD) -i $< -o $@ -w 2000