1. RGB hexadecimal change
例: var color = '#69ad52'
let r = parseInt(“0px” + color.slice(1, 3)) //105
let g = parseInt(“0px” + color.slice(3, 5)) //173
let b = parseInt(“0px” + color.slice(5, 7)) //82
2.RGB turn hex
例: var color = 'rgb(105, 173,82)'
let hex = "#" + (( 1<< 24 ) + ( r << 16 ) + ( g << 8 ) + b).toString(16).slice(1) // #69ad52