颜色加深或减淡

class Color {
HexToRgb(str) {
str = str.replace('#', '')
const hxs = str.match(/../g)
for (let i = 0; i < 3; i++) {
hxs[i] = parseInt(hxs[i], 16)
}
return hxs
}
RgbToHex(a, b, c) {
const hexs = [a.toString(16), b.toString(16), c.toString(16)]
for (let i = 0; i < 3; i++) {
if (hexs[i].length === 1) hexs[i] = '0' + hexs[i]
}
return '#' + hexs.join('')
}
getDarkColor(color, level) {
const rgbc = this.HexToRgb(color)
for (let i = 0; i < 3; i++) {
rgbc[i] = Math.floor(rgbc[i] * (1 - level))
}
return this.RgbToHex(rgbc[0], rgbc[1], rgbc[2])
}
getLightColor(color, level) {
const rgbc = this.HexToRgb(color)
for (let i = 0; i < 3; i++) {
rgbc[i] = Math.floor((255 - rgbc[i]) * level + rgbc[i])
}
return this.RgbToHex(rgbc[0], rgbc[1], rgbc[2])
}
}

const colorFn = new Color()

//colorFn.getDarkColor('#6CA3EF', 0.1)