如何从CSS颜色中提取r，g，b值？

What would be the easiest way to transform

什么是最简单的转型方式

$('#my_element').css('backgroundColor')

to object like this:

像这样的对象:

{ r: red_value, g: green_value, b: blue_value, a: alpha_value }

6 个解决方案

#1

var c = $('body').css('background-color');
var rgb = c.replace(/^(rgb|rgba)\(/,'').replace(/\)$/,'').replace(/\s/g,'').split(',');

for(var i in rgb) {
  console.log(rgb[i]);
}

Try it here http://jsbin.com/uhawa4

在这里试试http://jsbin.com/uhawa4

Edit :

var c = $('body').css('background-color');
var rgb = c.replace(/^rgba?\(|\s+|\)$/g,'').split(',');

for(var i in rgb) {
  console.log(rgb[i]);
}

or even simpler way, just aiming at numbers

甚至更简单的方法,只针对数字

var c = 'rgba(60,4,2,6)';
var rgb = c.match(/\d+/g);

for(var i in rgb) {
  console.log(rgb[i]);
}

#2

You would do something like:

你会做的事情如下:

$.fn.ToRgb = function()
{
    if(this.charAt(0) == "#"){this = this.substring(1,7);} //remove the #
    return {
        R : parseInt(this.substring(0,2) ,16),
        G : parseInt(this.substring(2,4) ,16),
        B : parseInt(this.substring(4,6) ,16),
    }
}

RGB = $('#my_element').css('backgroundColor').ToRgb();


/*
   * console.log(rgb) =>
   * {
   *   R: X
   *   G: X
   *   B: X 
   * }
*/

Pretty simple :)

很简单:)

#3

Say you have the following CSS rule:

假设您有以下CSS规则:

#my_element {
    background-color: rgba(100, 0, 255, 0.5);
}

Then this is how you could get an RBGA object:

那么这就是你如何得到一个RBGA对象:

var colorStr = $('#my_element').css('backgroundColor'); // "rgba(100, 0, 255, 0.5)"

// using string methods
colorStr = colorStr.slice(colorStr.indexOf('(') + 1, colorStr.indexOf(')')); // "100, 0, 255, 0.5"
var colorArr = colorStr.split(','),
    i = colorArr.length;

while (i--)
{
    colorArr[i] = parseInt(colorArr[i], 10);
}

var colorObj = {
    r: colorArr[0],
    g: colorArr[1],
    b: colorArr[2],
    a: colorArr[3]
}

#4

More simple:

 //javascript code
 var color = $('#my_element').css('backgroundColor');
 var rgb = /rgb\((\d+), (\d+), (\d+)\)/.exec(color);
  var r = rgb[1],
      g = rgb[2],
      b = rgb[3];
  console.log('Red  :' + r);
  console.log('Green:' + g);
  console.log('Blue :' + b);

#5

To convert rgba string to object with keys:

要使用键将rgba字符串转换为对象:

convertRGBtoOBJ(colorString)
{
  const rgbKeys = ['r', 'g', 'b', 'a'];
  let rgbObj = {};
  let color = colorString.replace(/^rgba?\(|\s+|\)$/g,'').split(',');

  for (let i in rgbKeys)
    rgbObj[rgbKeys[i]] = color[i] || 1;

  return rgbObj;
}

console.log(convertRGBtoOBJ('rgba(23,54,230,0.5)'))

/*
  Object {r: "23", g: "54", b: "230", a: 0.5}
*/

#6

As seen here:

如下所示:

R = hexToR("#FFFFFF");
G = hexToG("#FFFFFF");
B = hexToB("#FFFFFF");

function hexToR(h) {return parseInt((cutHex(h)).substring(0,2),16)}
function hexToG(h) {return parseInt((cutHex(h)).substring(2,4),16)}
function hexToB(h) {return parseInt((cutHex(h)).substring(4,6),16)}
function cutHex(h) {return (h.charAt(0)=="#") ? h.substring(1,7):h}

This script basically takes each color pair from your hexcolor code (for example #F0556A) and switches it to a integer using parseInt with base 16 .

此脚本基本上从您的hexcolor代码中获取每个颜色对(例如#F0556A),并使用带有基数16的parseInt将其切换为整数。

#1

var c = $('body').css('background-color');
var rgb = c.replace(/^(rgb|rgba)\(/,'').replace(/\)$/,'').replace(/\s/g,'').split(',');

for(var i in rgb) {
  console.log(rgb[i]);
}