diff --git a/types/color.go b/types/color.go
index 63ccd71d6..b0df8c892 100644
--- a/types/color.go
+++ b/types/color.go
@@ -3,25 +3,3 @@ package types
 const Green = "#228B22"
 const Red = "#800000"
 
-// SideType define side type of order
-type SideType string
-
-const (
-	SideTypeBuy = SideType("BUY")
-	SideTypeSell = SideType("SELL")
-)
-
-func (side SideType) Color() string {
-	if side == SideTypeBuy {
-		return Green
-	}
-	if side == SideTypeSell {
-		return Red
-	}
-
-	return "#f0f0f0"
-}
-
-func SideToColorName(side SideType) string {
-	return side.Color()
-}
diff --git a/types/side.go b/types/side.go
new file mode 100644
index 000000000..7fd24785b
--- /dev/null
+++ b/types/side.go
@@ -0,0 +1,24 @@
+package types
+
+// SideType define side type of order
+type SideType string
+
+const (
+	SideTypeBuy  = SideType("BUY")
+	SideTypeSell = SideType("SELL")
+)
+
+func (side SideType) Color() string {
+	if side == SideTypeBuy {
+		return Green
+	}
+	if side == SideTypeSell {
+		return Red
+	}
+
+	return "#f0f0f0"
+}
+
+func SideToColorName(side SideType) string {
+	return side.Color()
+}