diff --git a/ansi/codeblock.go b/ansi/codeblock.go
index 72d8615..3af38df 100644
--- a/ansi/codeblock.go
+++ b/ansi/codeblock.go
@@ -63,7 +63,7 @@ func (e *CodeBlockElement) Render(w io.Writer, ctx RenderContext) error {
 	}
 	theme := rules.Theme
 
-	if rules.Chroma != nil {
+	if rules.Chroma != nil && ctx.options.ColorProfile > 1 {
 		theme = "charm"
 		styles.Register(chroma.MustNewStyle("charm",
 			chroma.StyleEntries{