diff --git a/init.lua b/init.lua
index de8b851..6bc18a6 100644
--- a/init.lua
+++ b/init.lua
@@ -108,16 +108,6 @@ local function cache_fuel(item)
 	end
 end
 
-local color_codes = {
-	red = "#FF0000",
-	yellow = "#FFFF00",
-}
-
-local function colorize(str, color)
-	color = color or "yellow"
-	return mt.colorize(color_codes[color], str)
-end
-
 local function extract_groups(str)
 	return str:sub(7):split(",")
 end
@@ -158,7 +148,7 @@ local function get_tooltip(item, groups, cooktime, burntime)
 	if groups then
 		local groupstr = {}
 		for i = 1, #groups do
-			groupstr[#groupstr + 1] = colorize(groups[i])
+			groupstr[#groupstr + 1] = mt.colorize("yellow", groups[i])
 		end
 		groupstr = concat(groupstr, ", ")
 		tooltip = S("Any item belonging to the group(s):") .. " " .. groupstr
@@ -168,12 +158,12 @@ local function get_tooltip(item, groups, cooktime, burntime)
 
 	if cooktime then
 		tooltip = tooltip .. "\n" .. S("Cooking time:") .. " " ..
-			colorize(cooktime)
+			mt.colorize("yellow", cooktime)
 	end
 
 	if burntime then
 		tooltip = tooltip .. "\n" .. S("Burning time:") .. " " ..
-			colorize(burntime)
+			mt.colorize("yellow", burntime)
 	end
 
 	return "tooltip[" .. item .. ";" .. tooltip .. "]"
@@ -361,8 +351,8 @@ local function make_formspec(player_name)
 	fs[#fs + 1] = "tooltip[next;" .. S("Next page") .. "]"
 	fs[#fs + 1] = "image_button[" .. (data.iX - (sfinv_only and 2.6 or 3.1)) ..
 			",0.12;0.8,0.8;craftguide_prev_icon.png;prev;]"
-	fs[#fs + 1] = "label[" .. (data.iX - (sfinv_only and 1.7 or 2.2)) ..
-			",0.22;" .. colorize(data.pagenum) .. " / " .. data.pagemax .. "]"
+	fs[#fs + 1] = "label[" .. (data.iX - (sfinv_only and 1.7 or 2.2)) .. ",0.22;" ..
+			mt.colorize("yellow", data.pagenum) .. " / " .. data.pagemax .. "]"
 	fs[#fs + 1] = "image_button[" .. (data.iX - (sfinv_only and 0.7 or 1.2) -
 			(data.iX >= 11 and 0.08 or 0)) ..
 			",0.12;0.8,0.8;craftguide_next_icon.png;next;]"
@@ -877,7 +867,7 @@ if not progressive_mode then
 			end
 
 			if not node_name then
-				return false, colorize("[craftguide] ", "red") ..
+				return false, mt.colorize("red", "[craftguide] ") ..
 						S("No node pointed")
 			elseif not player_data[name] then
 				init_data(player, name)
@@ -891,9 +881,9 @@ if not progressive_mode then
 			local is_fuel = fuel_cache[node_name]
 
 			if no_recipes and not is_fuel then
-				return false, colorize("[craftguide] ", "red") ..
+				return false, mt.colorize("red", "[craftguide] ") ..
 					S("No recipe for this node:") .. " " ..
-					colorize(node_name)
+					mt.colorize("yellow", node_name)
 			end
 
 			if is_fuel and no_recipes then