diff --git a/logger/core.go b/logger/core.go
index d6ce4d0..3632398 100644
--- a/logger/core.go
+++ b/logger/core.go
@@ -300,7 +300,7 @@ func getLoggerNormalPrefix(lvl level, skipCaller int, opts Options) string {
 	b.WriteString(getArgLogLevel(lvl, opts))
 	b.WriteString(datetimeString)
 	if !opts.HideAllArgs && !opts.HideArgCaller {
-		b.WriteString(" \x1b[4m")
+		b.WriteString(StyleUnderscore)
 		b.WriteString(getArgCaller(skipCaller))
 		b.WriteString(StyleReset)
 		b.WriteString(":")
@@ -352,7 +352,7 @@ func getLoggerJson(lvl level, skipCaller int, opts Options, format string, v ...
 }
 
 func getArgLogLevel(lvl level, opts Options) string {
-	color := "\x1b[1m"
+	color := StyleBold
 	if opts.DisablePrefixColors {
 		color += level("").colorLevel()
 	} else {
diff --git a/logger/enum.go b/logger/enum.go
index 8860c26..c8f40c5 100644
--- a/logger/enum.go
+++ b/logger/enum.go
@@ -46,7 +46,7 @@ const (
 )
 const (
 	StyleReset      = "\x1b[0m"
-	StyleBright     = "\x1b[1m"
+	StyleBold       = "\x1b[1m"
 	StyleDim        = "\x1b[2m"
 	StyleUnderscore = "\x1b[4m"
 	StyleBlink      = "\x1b[5m"