十六进制颜色值与RGB颜色值互相转换
RGB(A)颜色转换为十六进制的颜色值十六进制颜色值转换为RGB(A)颜色值RGB(A)颜色转换为十六进制的颜色值
export function rgbToHex(val) {var r, g, b, a,regRgba = /rgba?\((\d{1,3}),(\d{1,3}),(\d{1,3})(,([.\d]+))?\)/, //判断rgb颜色值格式的正则表达式，如rgba(255,20,10,.54)rsa = val.replace(/\s+/g, '').match(regRgba);if (!!rsa) {r = parseInt(rsa[1]).toString(16);r = r.length == 1 ? '0' + r : r;g = (+rsa[2]).toString(16);g = g.length == 1 ? '0' + g : g;b = (+rsa[3]).toString(16);b = b.length == 1 ? '0' + b : b;a = (+(rsa[5] ? rsa[5] : 1)) * 100;return {hex: '#' + r + g + b, r: parseInt(r, 16), g: parseInt(g, 16), b: parseInt(b, 16), alpha: Math.ceil(a) };} else {return {hex: '无效', alpha: 100 };}}
十六进制颜色值转换为RGB(A)颜色值
export function hexToRgb (val) {// 16进制颜色值的正则var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;// 把颜色值变成小写var color = val.toLowerCase();var result = '';if (reg.test(color)) {// 如果只有三位的值，需变成六位，如：#fff => #ffffffif (color.length === 4) {var colorNew = "#";for (var i = 1; i < 4; i += 1) {colorNew += color.slice(i, i + 1).concat(color.slice(i, i + 1));}color = colorNew;}// 处理六位的颜色值，转为RGBvar colorChange = [];for (var i = 1; i < 7; i += 2) {colorChange.push(parseInt("0x" + color.slice(i, i + 2)));}result = "rgb(" + colorChange.join(",") + ")";return {rgb: result, r: colorChange[0], g: colorChange[1], b: colorChange[2] };} else {result = '无效';return {rgb: result };}}
