Dynamic request body -for color api

For color api i have created random Hex color using the fake library and i stored it in the variable. On sending the get request it should get the appropriate name and rgb of that random hex color this is the prerequisite script i am not getting the response what i am excepting so in the prerequisite script itself i have embedded the get request to receive the name and rgb and it has to be the payload to the post method.
const setBg = () => {

const color = Math.floor(Math.random()*16777215).toString(16);



//var payload = JSON.stringify(body);

//pm.globals.set(‘payload’, payload);

//var color = d3.color(Math.floor(Math.random()*16777215).toString(16));


url: ' http://thecolorapi.com/id?hex={{color}}&rgb=0,71,171&hsl=215,100%,34%&cmyk=100,58,0,33',

method: 'GET',

header: 'headername1:value1',

body: {

rgb: " ",

name: " "


}, function (err, res) {



and i am getting response as follow
“args”: {},

"data": {},

"files": {},

"form": {},

"headers": {

    "x-forwarded-proto": "https",

    "x-forwarded-port": "443",

    "host": "postman-echo.com",

    "x-amzn-trace-id": "Root=1-60ac0db5-053852865f7318ff028e2852",

    "content-length": "0",

    "authorization": "",

    "user-agent": "PostmanRuntime/7.28.0",

    "accept": "*/*",

    "postman-token": "eac2df87-49f0-4006-9857-b709e18cf7bb",

    "accept-encoding": "gzip, deflate, br",

    "cookie": "sails.sid=s%3AMRNOeaMDE97Jh0s6gOVv_NU3p7169ijC.A1ERw8S3XNLN7mwbai2F7NscJpP%2BatrHUkTIN6JTIy8"


"json": null,

"url": "https://postman-echo.com/post"

what is wrong in my script thank you very much