使用下面的jQuery将获得元素背景颜色的RGB值:
$('#selector').css('backgroundColor');
有没有办法得到十六进制值而不是RGB?
使用下面的jQuery将获得元素背景颜色的RGB值:
$('#selector').css('backgroundColor');
有没有办法得到十六进制值而不是RGB?
当前回答
var hexDigits = new Array
("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
//Function to convert rgb color to hex format
function rgb2hex(rgb) {
rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
return "#" + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
}
function hex(x) {
return isNaN(x) ? "00" : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
}
(源)
其他回答
大多数浏览器似乎在使用时返回RGB值:
$('#selector').css('backgroundColor');
只有i.e.(到目前为止只测试了6个)返回十六进制值。
为了避免在i.e.中出现错误消息,你可以将函数包装在if语句中:
function rgb2hex(rgb) {
if ( rgb.search("rgb") == -1 ) {
return rgb;
} else {
rgb = rgb.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+))?\)$/);
function hex(x) {
return ("0" + parseInt(x).toString(16)).slice(-2);
}
return "#" + hex(rgb[1]) + hex(rgb[2]) + hex(rgb[3]);
}
}
函数返回以十六进制表示的元素的背景色。
function getBgColorHex(elem){
var color = elem.css('background-color')
var hex;
if(color.indexOf('#')>-1){
//for IE
hex = color;
} else {
var rgb = color.match(/\d+/g);
hex = '#'+ ('0' + parseInt(rgb[0], 10).toString(16)).slice(-2) + ('0' + parseInt(rgb[1], 10).toString(16)).slice(-2) + ('0' + parseInt(rgb[2], 10).toString(16)).slice(-2);
}
return hex;
}
使用的例子:
$('#div1').click(function(){
alert(getBgColorHex($(this));
}
斯菲德尔
嗨,这是我的解决方案后,获得元素的颜色与Javascript
function rgb_hex(rgb_string_js){ //example: "rgb(102,54,255)"
var new_rgb_list = rgb_string_js.replace("rgb(","").replace(")","").split(",");
return ("#" + parseInt(new_rgb_list[0]).toString(16) + parseInt(new_rgb_list[1]).toString(16) + parseInt(new_rgb_list[2]).toString(16));
}
从bootstrap颜色选择器获取的颜色类
// Color object
var Color = function(val) {
this.value = {
h: 1,
s: 1,
b: 1,
a: 1
};
this.setColor(val);
};
Color.prototype = {
constructor: Color,
//parse a string to HSB
setColor: function(val){
val = val.toLowerCase();
var that = this;
$.each( CPGlobal.stringParsers, function( i, parser ) {
var match = parser.re.exec( val ),
values = match && parser.parse( match ),
space = parser.space||'rgba';
if ( values ) {
if (space === 'hsla') {
that.value = CPGlobal.RGBtoHSB.apply(null, CPGlobal.HSLtoRGB.apply(null, values));
} else {
that.value = CPGlobal.RGBtoHSB.apply(null, values);
}
return false;
}
});
},
setHue: function(h) {
this.value.h = 1- h;
},
setSaturation: function(s) {
this.value.s = s;
},
setLightness: function(b) {
this.value.b = 1- b;
},
setAlpha: function(a) {
this.value.a = parseInt((1 - a)*100, 10)/100;
},
// HSBtoRGB from RaphaelJS
// https://github.com/DmitryBaranovskiy/raphael/
toRGB: function(h, s, b, a) {
if (!h) {
h = this.value.h;
s = this.value.s;
b = this.value.b;
}
h *= 360;
var R, G, B, X, C;
h = (h % 360) / 60;
C = b * s;
X = C * (1 - Math.abs(h % 2 - 1));
R = G = B = b - C;
h = ~~h;
R += [C, X, 0, 0, X, C][h];
G += [X, C, C, X, 0, 0][h];
B += [0, 0, X, C, C, X][h];
return {
r: Math.round(R*255),
g: Math.round(G*255),
b: Math.round(B*255),
a: a||this.value.a
};
},
toHex: function(h, s, b, a){
var rgb = this.toRGB(h, s, b, a);
return '#'+((1 << 24) | (parseInt(rgb.r) << 16) | (parseInt(rgb.g) << 8) | parseInt(rgb.b)).toString(16).substr(1);
},
toHSL: function(h, s, b, a){
if (!h) {
h = this.value.h;
s = this.value.s;
b = this.value.b;
}
var H = h,
L = (2 - s) * b,
S = s * b;
if (L > 0 && L <= 1) {
S /= L;
} else {
S /= 2 - L;
}
L /= 2;
if (S > 1) {
S = 1;
}
return {
h: H,
s: S,
l: L,
a: a||this.value.a
};
}
};
如何使用
var color = new Color("RGB(0,5,5)");
color.toHex()
Steven Pribilinskiy的答案去掉了前导零,例如#ff0000变成了#ff00。
一种解决方案是在最后两位数字后面附加一个前导0和子字符串。
var rgb = $('#selector').css('backgroundColor').match(/\d+/g);
var hex = '#'+ String('0' + Number(rgb[0]).toString(16)).slice(-2) + String('0' + Number(rgb[1]).toString(16)).slice(-2) + String('0' + Number(rgb[2]).toString(16)).slice(-2);