diff --git a/arduino.nanorc b/arduino.nanorc
index 1c60033..b97b2ce 100644
--- a/arduino.nanorc
+++ b/arduino.nanorc
@@ -109,7 +109,7 @@ color brightyellow "<[^=    ]*>" ""(\\.|[^"])*""
 color brightyellow start=""(\\.|[^"])*\\[[:space:]]*$" end="^(\\.|[^"])*""
 
 ## Comments
-color brightblue "//.*"
+color brightblue "^\s*//.*"
 color brightblue start="/\*" end="\*/"
 
 ## Trailing whitespace
diff --git a/asm.nanorc b/asm.nanorc
index 1273b8e..c5c5bd5 100644
--- a/asm.nanorc
+++ b/asm.nanorc
@@ -11,7 +11,7 @@ color brightcyan "^[[:space:]]*#[[:space:]]*(define|undef|include|ifn?def|endif|
 color brightyellow "<[^= 	]*>" ""(\\.|[^"])*""
 color brightyellow start=""(\\.|[^"])*\\[[:space:]]*$" end="^(\\.|[^"])*""
 ## Highlight comments
-color brightblue "//.*"
+color brightblue "^\s*//.*"
 color brightblue start="/\*" end="\*/"
 ## Highlight trailing whitespace
 color ,green "[[:space:]]+$"
diff --git a/c.nanorc b/c.nanorc
index 2550299..7b16cf6 100644
--- a/c.nanorc
+++ b/c.nanorc
@@ -35,7 +35,7 @@ color cyan "<[^= 	]*>" ""(\\.|[^"])*""
 #color cyan start=""(\\.|[^"])*\\[[:space:]]*$" end="^(\\.|[^"])*""
 
 ## Comment highlighting
-color brightblue "//.*"
+color brightblue "^\s*//.*"
 color brightblue start="/\*" end="\*/"
 
 ## Trailing whitespace
diff --git a/java.nanorc b/java.nanorc
index 9ec2b6e..53b0b5e 100644
--- a/java.nanorc
+++ b/java.nanorc
@@ -7,7 +7,7 @@ color cyan "\<(abstract|class|extends|final|implements|import|instanceof|interfa
 color red ""[^"]*""
 color yellow "\<(true|false|null)\>"
 icolor yellow "\b(([1-9][0-9]+)|0+)\.[0-9]+\b" "\b[1-9][0-9]*\b" "\b0[0-7]*\b" "\b0x[1-9a-f][0-9a-f]*\b"
-color blue " //.*"
+color blue "^\s*//.*"
 color blue start="/\*" end="\*/"
 color brightblue start="/\*\*" end="\*/"
 color ,green "[[:space:]]+$"
diff --git a/js.nanorc b/js.nanorc
index 648d48e..0d9cb33 100644
--- a/js.nanorc
+++ b/js.nanorc
@@ -49,4 +49,4 @@ color red "\\[0-7][0-7]?[0-7]?|\\x[0-9a-fA-F]+|\\[bfnrt'"\?\\]"
 
 ## Comments
 color brightblue start="/\*" end="\*/"
-color brightblue "//.*$"
+color brightblue "^\s*//.*$"
diff --git a/kotlin.nanorc b/kotlin.nanorc
index 6fd3459..a70b18d 100644
--- a/kotlin.nanorc
+++ b/kotlin.nanorc
@@ -19,7 +19,7 @@ color brightred "\<(inner|outer)\>"
 color brightblue "<[^= 	]*>" ""(\\.|[^"])*""
 
 ## Comment highlighting
-color red "//.*"
+color red "^\s*//.*"
 color red start="/\*" end="\*/"
 
 ## Trailing whitespace
diff --git a/pov.nanorc b/pov.nanorc
index f8cb8b5..6e71e27 100644
--- a/pov.nanorc
+++ b/pov.nanorc
@@ -11,5 +11,5 @@ color brightred "\<(fog|object|camera)\>"
 color green "(\{|\}|\(|\)|\;|\]|\[|`|\\|\$|<|>|!|=|&|\|)"
 color brightmagenta "\<(union|group|subgroup)\>"
 ## Comment highlighting
-color brightblue "//.*"
+color brightblue "^\s*//.*"
 color brightblue start="/\*" end="\*/"
diff --git a/rust.nanorc b/rust.nanorc
index 3d3c17a..f776b64 100644
--- a/rust.nanorc
+++ b/rust.nanorc
@@ -26,7 +26,7 @@ color green start="\".*\\$" end=".*\""
 color green start="r#+\"" end="\"#+"
 
 # Comments
-color blue "//.*"
+color blue "^\s*//.*"
 color blue start="/\*" end="\*/"
 
 # Attributes
diff --git a/scala.nanorc b/scala.nanorc
index 4a11006..ab2a119 100644
--- a/scala.nanorc
+++ b/scala.nanorc
@@ -6,7 +6,7 @@ color red "\<(match|val|var|break|case|catch|continue|default|do|else|finally|fo
 color cyan "\<(def|object|case|trait|lazy|implicit|abstract|class|extends|final|implements|import|instanceof|interface|native|package|private|protected|public|static|strictfp|super|synchronized|throws|volatile|sealed)\>"
 color red ""[^"]*""
 color yellow "\<(true|false|null)\>"
-color blue "//.*"
+color blue "^\s*//.*"
 color blue start="/\*" end="\*/"
 color brightblue start="/\*\*" end="\*/"
 color ,green "[[:space:]]+$"
diff --git a/swift.nanorc b/swift.nanorc
index d1af78e..636441a 100644
--- a/swift.nanorc
+++ b/swift.nanorc
@@ -55,8 +55,8 @@ color red ""[^"]*""
 color white start="\\\(" end="\)"
 
 # Comments
-color green "//.*"
-color brightgreen "///.*"
+color green "^\s*//.*"
+color brightgreen "^\s*///.*"
 color green start="/\*\*" end="\*/"
 color green "[/**]"
 
diff --git a/ts.nanorc b/ts.nanorc
index f233465..bd1c9f1 100644
--- a/ts.nanorc
+++ b/ts.nanorc
@@ -36,7 +36,7 @@ color red "\\[0-7][0-7]?[0-7]?|\\x[0-9a-fA-F]+|\\[bfnrt'"\?\\]"
 
 ## Comments
 color magenta start="/\*" end="\*/"
-color magenta "//.*$"
+color magenta "^\s*//.*$"
 
 ## Trailing whitespace
 color ,green "[[:space:]]+$"
diff --git a/verilog.nanorc b/verilog.nanorc
index 820b53d..b414308 100644
--- a/verilog.nanorc
+++ b/verilog.nanorc
@@ -74,7 +74,7 @@ color brightyellow ""([^"]|\\")*"" "<[^[:blank:]=]*>"
 ###color brightyellow start=""(\\.|[^"])*\\[[:space:]]*$" end="^(\\.|[^"])*""
 
 # Comments.
-color brightblue "//.*"
+color brightblue "^\s*//.*"
 color brightblue start="/\*" end="\*/"
 
 # Reminders.