function rgbToHex(r, g, b) {
  return '#' + componentToHex(r) + componentToHex(g) + componentToHex(b);
}
function rgbToHex(r, g, b) {
  return '#' + componentToHex(r) + componentToHex(g) + componentToHex(b);
}
function rgbToHex ( r , g , b ) { return '#' + componentToHex ( r ) + componentToHex ( g ) + componentToHex ( b ) ; }
Convert RGB to HEX
@param {*} r
@param {*} g
@param {*} b

@return {*}
Convert RGB to HEX @param { * } r @param { * } g @param { * } b