Replacing Specific color code in css using jquery

Question

I want to replace #789034 code to another code like #456780 where ever it finds in main.css using jquery

I am having a main.css file something like below :

Answer 1

Why, its elementary, dear Watson. Just grab all possible style-keys, check if they contain the word color, then replace all occurrences of the color with the new one using a complex regex system.

// gathers all style "keys" like height, width, color, etc
var keys = Object.values(window.getComputedStyle($('html').get(0)));
// removes any style keys which are not color related
var filteredKeys = keys.filter(function (key){return key.indexOf('color') > -1});
// parses the hex string of the color to be replaced into its R, G, and B parts and stores them in an array
var colors = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec("#789034").splice(1,3); 
// converts these hex strings to decimal and combines them into a "rgb(#, #, #)" formatted color string
var rgb = 'rgb(' + colors.map(function (color){return parseInt(color, 16)}).join(', ') + ')';
// go through each element in the page
$("*").each(function (index, element) {
    // go through each color-related style "key"
    filteredKeys.forEach(function(key) {
        // if the element's value for this key matches the color to be replaced...
        if ($(element).css(key) == rgb) {
            // ...replace that color with the replacement color
            $(element).css(key, "#456780");
        }
    });
});

div {
    height: 50px;
    width: 50px;
}
.common-color {
    color:#789034;
}
.new-cls {
    border-style: solid;
    border-color:#789034;
}
.awesome-one {
    background-color:#789034;
    height:200px;
    width:300px;
}

hello
cool

EDIT:

Or, if you would rather, here is a simple function to use. Color 1 will be replaced by color 2:

function replaceColor(color1, color2) {
    var keys = Object.values(window.getComputedStyle($('html').get(0)));
    var filteredKeys = keys.filter(function (key){return key.indexOf('color') > -1});
    var colors = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(color1).splice(1,3); 
    var rgb = 'rgb(' + colors.map(function (color){return parseInt(color, 16)}).join(', ') + ')';
    $("*").each(function (index, element) {
        filteredKeys.forEach(function(key) {
            if ($(element).css(key) == rgb) {
                $(element).css(key, color2);
            }
        });
    });
}