diff --git a/ansi.go b/ansi.go
index 346450a..f84800c 100644
--- a/ansi.go
+++ b/ansi.go
@@ -145,9 +145,13 @@ func (a *ansi) Write(text []byte) (int, error) {
 						case "30", "31", "32", "33", "34", "35", "36", "37":
 							colorNumber, _ := strconv.Atoi(field)
 							foreground = lookupColor(colorNumber-30, false)
+						case "39":
+							foreground = "default"
 						case "40", "41", "42", "43", "44", "45", "46", "47":
 							colorNumber, _ := strconv.Atoi(field)
 							background = lookupColor(colorNumber-40, false)
+						case "49":
+							background = "default"
 						case "90", "91", "92", "93", "94", "95", "96", "97":
 							colorNumber, _ := strconv.Atoi(field)
 							foreground = lookupColor(colorNumber-90, true)