RegExp to complete

Hi Experts,

I've come to one RegExp on my own and it is near perfect to my needs, but it is needed to solve one issue.

Here is the income string:

section{  font-size  :  22px  ;    color : #cecece; } @media { #holder{ color:#cecece; font-size : 10px; border-color:#cecece; font:color sasd;   font:border-color; }  article{ font-size:14px; } header { color:#ffffff; } } .element{font-size:20px;} section{ font-size:12px; color:#cecece; } @media() {.element{font-size:20px;}} section{ font-size:12px; color:#cecece; font-weight:bold; } footer{color:#cacaca;  font:border-color, color, more, color; color:border-color, color, more, color; font-size:1111; font-size:color getting, better; color: color; font-size: more color;} test{font-size:10px;color:zzz;}

Regular expression:

(?!{)(?!;)(?![^{;]*(border-color|color)[^{;]*)\b[^{;]*;

Here is the highlighted result screenshot at http://regexpal.com/ 

Issue is that at some reason it selects all text that comes after words "border-color" and "color" that are listed with (border-color|color) up to symbol ";". I am trying to fix it, to not select those text if the needed word exist till ";". I've did a screenshot marked with red rectangle of what should be omitted in search results

Also, here is the logical explanation what I am trying to achieve: RegExp has to select all text that hasn't needed word up to symbol ";" (including those symbol)  inside { .... }. If at least one of needed word exists inside those part of text - it should remain up to symbol ";".

Want to notice that it is needed to work under Javascript, so Lookbehind Assertions won't work.

This question is connected with my previous question: https://www.experts-exchange.com/Programming/Languages/Regular_Expressions/Q_27878123.html
I still wasn't able to get all in one RegExp at those question, so I've decided to work more on my own and simplify task.

I will be very thankful if somebody will help me to complete with this.