Update

util.lua

@@ -0,0 +1,27 @@
+
+local util = {}
+
+function util.hexTorgb(str)
+	if str:sub(1, 1) == "#" then
+		str = str:sub(2, -1)
+	end
+	local r = tonumber(str:sub(1, 2), 16)
+	local g = tonumber(str:sub(3, 4), 16)
+	local b = tonumber(str:sub(5, 6), 16)
+	return r, g, b
+end
+
+function util.rgbToHex(r, g, b)
+	return ("#%02x%02x%02x"):format(r, g, b)
+end
+
+function util.lightenColour(c, n)
+	local r, g, b = util.hexTorgb(c)
+	r = math.min(math.max(r, n*1.1), 0xff)
+	g = math.max(g, n)
+	b = math.max(b, n*0.9)
+	return util.rgbToHex(r, g, b)
+end
+
+return util
+