Hi, Is there any way to change the comments color in a js file?

[mergimi55]

or can I make a specific word like Titanic in a red color ?
// comments like this are always grey

[fico]

You can change the comment color in your active *.tmTheme file. Search for comment and it should take you right to the values you need to change ( foreground and/or background ).

For custom word highlighting, try HighlightWords.