Converting Marak's color npm package from one mode to another

gistfile1.js

// Color Converter
function convertMode (str, from, to) {

    var lex = [
        'bold', 'italic', 'underline', 'inverse', 
        'white', 'grey', 'black', 
        'blue', 'cyan', 'green', 'magenta', 'red', 'yellow'
    ];

    var styles = {

        console:  {
            //styles
            'bold'      : ['\033[1m',  '\033[22m'],
            'italic'    : ['\033[3m',  '\033[23m'],
            'underline' : ['\033[4m',  '\033[24m'],
            'inverse'   : ['\033[7m',  '\033[27m'],
            //grayscale
            'white'     : ['\033[37m', '\033[39m'],
            'grey'      : ['\033[90m', '\033[39m'],
            'black'     : ['\033[30m', '\033[39m'],
            //colors
            'blue'      : ['\033[34m', '\033[39m'],
            'cyan'      : ['\033[36m', '\033[39m'],
            'green'     : ['\033[32m', '\033[39m'],
            'magenta'   : ['\033[35m', '\033[39m'],
            'red'       : ['\033[31m', '\033[39m'],
            'yellow'    : ['\033[33m', '\033[39m']
        },

        browser: {
            
            //styles
            'bold'      : ['<b>',  '</b>'],
            'italic'    : ['<i>',  '</i>'],
            'underline' : ['<u>',  '</u>'],
            'inverse'   : ['<span style="background-color:black;color:white;">',  '</span>'],
            //grayscale
            'white'     : ['<span style="color:white;">',   '</span>'],
            'grey'      : ['<span style="color:grey;">',    '</span>'],
            'black'     : ['<span style="color:black;">',   '</span>'],
            //colors
            'blue'      : ['<span style="color:blue;">',    '</span>'],
            'cyan'      : ['<span style="color:cyan;">',    '</span>'],
            'green'     : ['<span style="color:green;">',   '</span>'],
            'magenta'   : ['<span style="color:magenta;">', '</span>'],
            'red'       : ['<span style="color:red;">',     '</span>'],
            'yellow'    : ['<span style="color:yellow;">',  '</span>']
        },

        none : {}
    };

    // Convert!
    lex.forEach(function(style) {

        styles.none[style] = ['',''];

        var startFilter = new RegExp(styles[from][style][0], "g"),
            endFilter   = new RegExp(styles[to][style][1], "g");
        
        str = str.replace(startFilter, styles[to][style][0]);
        str = str.replace(endFilter, styles[to][style][1]);

    });

    return str;
}

if (typeof module !== 'undefined') {
    module.exports = convertMode;
}