diff --git a/color.go b/color.go
index edb2a5d..b215424 100644
--- a/color.go
+++ b/color.go
@@ -28,16 +28,18 @@ const (
 )
 
 // color render templates
+//
 // ESC 操作的表示:
 // 	"\033"(Octal 8进制) = "\x1b"(Hexadecimal 16进制) = 27 (10进制)
 const (
-	SettingTpl   = "\x1b[%sm"
+	StartSet = "\x1b["
+	// ResetSet close all properties.
+	ResetSet   = "\x1b[0m"
+	SettingTpl = "\x1b[%sm"
+	// FullColorTpl for build color code
 	FullColorTpl = "\x1b[%sm%s\x1b[0m"
 )
 
-// ResetSet Close all properties.
-const ResetSet = "\x1b[0m"
-
 // CodeExpr regex to clear color codes eg "\033[1;36mText\x1b[0m"
 const CodeExpr = `\033\[[\d;?]+m`
 
@@ -144,7 +146,7 @@ func ResetOptions() {
 	output = os.Stdout
 }
 
-// ForceColor force open color render
+// ForceSetColorLevel force open color render
 func ForceSetColorLevel(level terminfo.ColorLevel) terminfo.ColorLevel {
 	oldLevelVal := colorLevel
 	colorLevel = level
@@ -178,6 +180,7 @@ func InnerErrs() []error {
  *************************************************************/
 
 // RenderCode render message by color code.
+//
 // Usage:
 // 	msg := RenderCode("3;32;45", "some", "message")
 func RenderCode(code string, args ...interface{}) string {
@@ -196,7 +199,8 @@ func RenderCode(code string, args ...interface{}) string {
 		return ClearCode(message)
 	}
 
-	return fmt.Sprintf(FullColorTpl, code, message)
+	// return fmt.Sprintf(FullColorTpl, code, message)
+	return StartSet + code + "m" + message + ResetSet
 }
 
 // RenderWithSpaces Render code with spaces.
@@ -212,10 +216,12 @@ func RenderWithSpaces(code string, args ...interface{}) string {
 		return ClearCode(message)
 	}
 
-	return fmt.Sprintf(FullColorTpl, code, message)
+	// return fmt.Sprintf(FullColorTpl, code, message)
+	return StartSet + code + "m" + message + ResetSet
 }
 
 // RenderString render a string with color code.
+//
 // Usage:
 // 	msg := RenderString("3;32;45", "a message")
 func RenderString(code string, str string) string {
@@ -228,10 +234,12 @@ func RenderString(code string, str string) string {
 		return ClearCode(str)
 	}
 
-	return fmt.Sprintf(FullColorTpl, code, str)
+	// return fmt.Sprintf(FullColorTpl, code, str)
+	return StartSet + code + "m" + str + ResetSet
 }
 
 // ClearCode clear color codes.
+//
 // eg: "\033[36;1mText\x1b[0m" -> "Text"
 func ClearCode(str string) string {
 	return codeRegex.ReplaceAllString(str, "")
diff --git a/color_16.go b/color_16.go
index f2a211a..cadf385 100644
--- a/color_16.go
+++ b/color_16.go
@@ -167,9 +167,7 @@ const (
 )
 
 // Bit4 an method for create Color
-func Bit4(code uint8) Color {
-	return Color(code)
-}
+func Bit4(code uint8) Color { return Color(code) }
 
 /*************************************************************
  * Color render methods
@@ -185,33 +183,27 @@ func (c Color) Name() string {
 }
 
 // Text render a text message
-func (c Color) Text(message string) string {
-	return RenderString(c.String(), message)
-}
+func (c Color) Text(message string) string { return RenderString(c.String(), message) }
 
 // Render messages by color setting
 // Usage:
 // 		green := color.FgGreen.Render
 // 		fmt.Println(green("message"))
-func (c Color) Render(a ...interface{}) string {
-	return RenderCode(c.String(), a...)
-}
+func (c Color) Render(a ...interface{}) string { return RenderCode(c.String(), a...) }
 
 // Renderln messages by color setting.
 // like Println, will add spaces for each argument
+//
 // Usage:
 // 		green := color.FgGreen.Renderln
 // 		fmt.Println(green("message"))
-func (c Color) Renderln(a ...interface{}) string {
-	return RenderWithSpaces(c.String(), a...)
-}
+func (c Color) Renderln(a ...interface{}) string { return RenderWithSpaces(c.String(), a...) }
 
 // Sprint render messages by color setting. is alias of the Render()
-func (c Color) Sprint(a ...interface{}) string {
-	return RenderCode(c.String(), a...)
-}
+func (c Color) Sprint(a ...interface{}) string { return RenderCode(c.String(), a...) }
 
 // Sprintf format and render message.
+//
 // Usage:
 // 	green := color.Green.Sprintf
 //  colored := green("message")
@@ -220,6 +212,7 @@ func (c Color) Sprintf(format string, args ...interface{}) string {
 }
 
 // Print messages.
+//
 // Usage:
 // 		color.Green.Print("message")
 // OR:
@@ -230,6 +223,7 @@ func (c Color) Print(args ...interface{}) {
 }
 
 // Printf format and print messages.
+//
 // Usage:
 // 		color.Cyan.Printf("string %s", "arg0")
 func (c Color) Printf(format string, a ...interface{}) {
@@ -237,9 +231,7 @@ func (c Color) Printf(format string, a ...interface{}) {
 }
 
 // Println messages with new line
-func (c Color) Println(a ...interface{}) {
-	doPrintlnV2(c.String(), a)
-}
+func (c Color) Println(a ...interface{}) { doPrintlnV2(c.String(), a) }
 
 // Light current color. eg: 36(FgCyan) -> 96(FgLightCyan).
 //
@@ -326,21 +318,13 @@ func (c Color) RGB() RGBColor {
 }
 
 // Code convert to code string. eg "35"
-func (c Color) Code() string {
-	// return fmt.Sprintf("%d", c)
-	return strconv.Itoa(int(c))
-}
+func (c Color) Code() string { return strconv.Itoa(int(c)) }
 
 // String convert to code string. eg "35"
-func (c Color) String() string {
-	// return fmt.Sprintf("%d", c)
-	return strconv.Itoa(int(c))
-}
+func (c Color) String() string { return strconv.Itoa(int(c)) }
 
 // IsValid color value
-func (c Color) IsValid() bool {
-	return c < 107
-}
+func (c Color) IsValid() bool { return c < 107 }
 
 /*************************************************************
  * basic color maps