将rgb转换为十六进制

Posted 2021-02-24

Convert rgb color detected by jQuery into hex value.

function rgb2hex(rgb) {
 //convert rgb value to hex
 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]);
}
 
//example get background color with jQuery
var bgcolor=rgb2hex($('body').css('background-color'));