diff --git a/src/qelmt/aci_colors.rs b/src/qelmt/aci_colors.rs
index 3140060..64c354b 100644
--- a/src/qelmt/aci_colors.rs
+++ b/src/qelmt/aci_colors.rs
@@ -260,5 +260,8 @@ pub const ACI_COLORS: [(u8,u8,u8); 255] = [
 ];
 
 pub fn aci_to_rgb(aci: u8) -> (u8,u8,u8) {
+    if(aci >= ACI_COLORS.len() as u8) {
+        return (255,255,255);
+    }
     ACI_COLORS[aci as usize]
 }