forgot to lowercase chars in color codes table

init.lua

@@ -52,6 +52,7 @@ local char_to_color = {
 	["7"] = 7,
 	["8"] = 8,
 	["9"] = 9,
+
 	["A"] = 10,
 	["B"] = 11,
 	["C"] = 12,
@@ -69,7 +70,27 @@ local char_to_color = {
 	["O"] = 24,
 	["P"] = 25,
 	["Q"] = 26,
-	["R"] = 27
+	["R"] = 27,
+
+	["a"] = 10,
+	["b"] = 11,
+	["c"] = 12,
+	["d"] = 13,
+	["e"] = 14,
+	["f"] = 15,
+	["g"] = 16,
+	["h"] = 17,
+	["i"] = 18,
+	["j"] = 19,
+	["k"] = 20,
+	["l"] = 21,
+	["m"] = 22,
+	["n"] = 23,
+	["o"] = 24,
+	["p"] = 25,
+	["q"] = 26,
+	["r"] = 27
+
 }
 
 -- the following functions based on the so-named ones in Jeija's digilines mod