diff --git a/src/style.css b/src/style.css
index 406bf72..33fd9eb 100644
--- a/src/style.css
+++ b/src/style.css
@@ -353,11 +353,19 @@ option {
   font-weight: bold;
 }
 
-.Math > .VARIABLE,
-.Math > .STRING {
+.Math > .COMMENT,
+.Math > .LINE_COMMENT {
+  color:gray;
+}
+
+.Math > .VARIABLE {
   color:var(--fg-color);
 }
 
+.Math > .STRING {
+  color:var(--code-green-color);
+}
+
 .Math > .LPAREN ,
 .Math > .RPAREN ,
 .Math > .LBRACE,
@@ -401,6 +409,11 @@ option {
   color:var(--code-red-color);
   font-weight: bold;
 }
+.Sequence > .COMMENT,
+.Sequence > .LINE_COMMENT
+{
+  color:gray;
+}
 
 .GraphPlanar > .STRING,
 .GraphPlanar > .ID {
diff --git a/src/translator/flowchart/Flowchart.g4 b/src/translator/flowchart/Flowchart.g4
index a69b124..c29e7df 100644
--- a/src/translator/flowchart/Flowchart.g4
+++ b/src/translator/flowchart/Flowchart.g4
@@ -2,8 +2,8 @@ grammar Flowchart;
 
 // Ignored TOKENS
 WS: [ \t\n]+ -> channel(HIDDEN);
-COMMENT: '/*' .*? '*/' -> channel(HIDDEN);
-LINE_COMMENT: '//' .*? ('\r'? '\n' | EOF) -> channel(HIDDEN);
+COMMENT: '/' '*' .*? '*' '/' -> channel(HIDDEN);
+LINE_COMMENT: '/' '/' (~('\n'))* -> channel(HIDDEN);
 
 SEMICOLON: ';';
 PL: '(';
diff --git a/src/translator/math/Math.g4 b/src/translator/math/Math.g4
index 322500c..3097b6d 100644
--- a/src/translator/math/Math.g4
+++ b/src/translator/math/Math.g4
@@ -86,9 +86,13 @@ EQ : '=' ;
 POW : '^' ;
 SUBSCRIPT: '_' ;
 EOL : '\r\n' | '\n' ;
-WS : [ \t]+ -> channel(HIDDEN);
 
 fragment CHAR : ~[!+-<>=_^(){}[\] \t\r\n"*] | [.0123456789];
 VARIABLE: CHAR+;
 
+// Ignored TOKENS
+WS: [ \t]+ -> channel(HIDDEN);
+COMMENT: '/' '*' .*? '*' '/' -> channel(HIDDEN);
+LINE_COMMENT: '/' '/' .*? ('\n' | EOF) -> channel(HIDDEN);
+
 // vim: filetype=antlr
diff --git a/src/translator/sequence/Sequence.g4 b/src/translator/sequence/Sequence.g4
index ba7cac7..321033e 100644
--- a/src/translator/sequence/Sequence.g4
+++ b/src/translator/sequence/Sequence.g4
@@ -2,6 +2,11 @@ grammar Sequence;
 
 // Lexer -----
 
+// Ignored TOKENS
+WS: [\t]+ -> channel(HIDDEN);
+COMMENT: '/' '*' .*? '*' '/' -> channel(HIDDEN);
+LINE_COMMENT: '/' '/' (~('\n'))* -> channel(HIDDEN);
+
 ARROW_RIGHT: '->';
 ARROW_LEFT: '<-';
 COMMA: ':';