curl --request POST \
  --url https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "custom_app_theme": {
    "alerts": {
      "borderRadius": "4px",
      "borderWidth": "1px",
      "variants": {
        "danger": {
          "backgroundColor": "#fffbfb",
          "borderColor": "#c53336"
        },
        "primary": {
          "backgroundColor": "#fdfcff",
          "borderColor": "#006cc1"
        }
      }
    },
    "body": {
      "color": "#525257",
      "fontSize": "16px"
    },
    "buttons": {
      "borderRadius": "4px",
      "variants": {
        "default": {
          "borderColor": "#1c1c1c"
        },
        "primary": {
          "activeBackgroundColor": "#005c5c",
          "backgroundColor": "#0A8080"
        }
      }
    },
    "formControl": {
      "borderColor": "#929292",
      "borderRadius": "4px",
      "focusBorderColor": "#005c5c"
    },
    "headings": {
      "h1": {
        "color": "#262626",
        "fontSize": "32px",
        "fontWeight": "500"
      },
      "h2": {
        "color": "#000fff",
        "fontSize": "50px",
        "fontWeight": "500"
      }
    },
    "link": {
      "color": "#0a8080",
      "decoration": "underline",
      "hoverColor": "#005c5c",
      "hoverDecoration": "underline"
    }
  }
}
'

import requests

url = "https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme"

payload = { "custom_app_theme": {
        "alerts": {
            "borderRadius": "4px",
            "borderWidth": "1px",
            "variants": {
                "danger": {
                    "backgroundColor": "#fffbfb",
                    "borderColor": "#c53336"
                },
                "primary": {
                    "backgroundColor": "#fdfcff",
                    "borderColor": "#006cc1"
                }
            }
        },
        "body": {
            "color": "#525257",
            "fontSize": "16px"
        },
        "buttons": {
            "borderRadius": "4px",
            "variants": {
                "default": { "borderColor": "#1c1c1c" },
                "primary": {
                    "activeBackgroundColor": "#005c5c",
                    "backgroundColor": "#0A8080"
                }
            }
        },
        "formControl": {
            "borderColor": "#929292",
            "borderRadius": "4px",
            "focusBorderColor": "#005c5c"
        },
        "headings": {
            "h1": {
                "color": "#262626",
                "fontSize": "32px",
                "fontWeight": "500"
            },
            "h2": {
                "color": "#000fff",
                "fontSize": "50px",
                "fontWeight": "500"
            }
        },
        "link": {
            "color": "#0a8080",
            "decoration": "underline",
            "hoverColor": "#005c5c",
            "hoverDecoration": "underline"
        }
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    custom_app_theme: {
      alerts: {
        borderRadius: '4px',
        borderWidth: '1px',
        variants: {
          danger: {backgroundColor: '#fffbfb', borderColor: '#c53336'},
          primary: {backgroundColor: '#fdfcff', borderColor: '#006cc1'}
        }
      },
      body: JSON.stringify({color: '#525257', fontSize: '16px'}),
      buttons: {
        borderRadius: '4px',
        variants: {
          default: {borderColor: '#1c1c1c'},
          primary: {activeBackgroundColor: '#005c5c', backgroundColor: '#0A8080'}
        }
      },
      formControl: {borderColor: '#929292', borderRadius: '4px', focusBorderColor: '#005c5c'},
      headings: {
        h1: {color: '#262626', fontSize: '32px', fontWeight: '500'},
        h2: {color: '#000fff', fontSize: '50px', fontWeight: '500'}
      },
      link: {
        color: '#0a8080',
        decoration: 'underline',
        hoverColor: '#005c5c',
        hoverDecoration: 'underline'
      }
    }
  })
};

fetch('https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'custom_app_theme' => [
        'alerts' => [
                'borderRadius' => '4px',
                'borderWidth' => '1px',
                'variants' => [
                                'danger' => [
                                                                'backgroundColor' => '#fffbfb',
                                                                'borderColor' => '#c53336'
                                ],
                                'primary' => [
                                                                'backgroundColor' => '#fdfcff',
                                                                'borderColor' => '#006cc1'
                                ]
                ]
        ],
        'body' => [
                'color' => '#525257',
                'fontSize' => '16px'
        ],
        'buttons' => [
                'borderRadius' => '4px',
                'variants' => [
                                'default' => [
                                                                'borderColor' => '#1c1c1c'
                                ],
                                'primary' => [
                                                                'activeBackgroundColor' => '#005c5c',
                                                                'backgroundColor' => '#0A8080'
                                ]
                ]
        ],
        'formControl' => [
                'borderColor' => '#929292',
                'borderRadius' => '4px',
                'focusBorderColor' => '#005c5c'
        ],
        'headings' => [
                'h1' => [
                                'color' => '#262626',
                                'fontSize' => '32px',
                                'fontWeight' => '500'
                ],
                'h2' => [
                                'color' => '#000fff',
                                'fontSize' => '50px',
                                'fontWeight' => '500'
                ]
        ],
        'link' => [
                'color' => '#0a8080',
                'decoration' => 'underline',
                'hoverColor' => '#005c5c',
                'hoverDecoration' => 'underline'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme"

	payload := strings.NewReader("{\n  \"custom_app_theme\": {\n    \"alerts\": {\n      \"borderRadius\": \"4px\",\n      \"borderWidth\": \"1px\",\n      \"variants\": {\n        \"danger\": {\n          \"backgroundColor\": \"#fffbfb\",\n          \"borderColor\": \"#c53336\"\n        },\n        \"primary\": {\n          \"backgroundColor\": \"#fdfcff\",\n          \"borderColor\": \"#006cc1\"\n        }\n      }\n    },\n    \"body\": {\n      \"color\": \"#525257\",\n      \"fontSize\": \"16px\"\n    },\n    \"buttons\": {\n      \"borderRadius\": \"4px\",\n      \"variants\": {\n        \"default\": {\n          \"borderColor\": \"#1c1c1c\"\n        },\n        \"primary\": {\n          \"activeBackgroundColor\": \"#005c5c\",\n          \"backgroundColor\": \"#0A8080\"\n        }\n      }\n    },\n    \"formControl\": {\n      \"borderColor\": \"#929292\",\n      \"borderRadius\": \"4px\",\n      \"focusBorderColor\": \"#005c5c\"\n    },\n    \"headings\": {\n      \"h1\": {\n        \"color\": \"#262626\",\n        \"fontSize\": \"32px\",\n        \"fontWeight\": \"500\"\n      },\n      \"h2\": {\n        \"color\": \"#000fff\",\n        \"fontSize\": \"50px\",\n        \"fontWeight\": \"500\"\n      }\n    },\n    \"link\": {\n      \"color\": \"#0a8080\",\n      \"decoration\": \"underline\",\n      \"hoverColor\": \"#005c5c\",\n      \"hoverDecoration\": \"underline\"\n    }\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"custom_app_theme\": {\n    \"alerts\": {\n      \"borderRadius\": \"4px\",\n      \"borderWidth\": \"1px\",\n      \"variants\": {\n        \"danger\": {\n          \"backgroundColor\": \"#fffbfb\",\n          \"borderColor\": \"#c53336\"\n        },\n        \"primary\": {\n          \"backgroundColor\": \"#fdfcff\",\n          \"borderColor\": \"#006cc1\"\n        }\n      }\n    },\n    \"body\": {\n      \"color\": \"#525257\",\n      \"fontSize\": \"16px\"\n    },\n    \"buttons\": {\n      \"borderRadius\": \"4px\",\n      \"variants\": {\n        \"default\": {\n          \"borderColor\": \"#1c1c1c\"\n        },\n        \"primary\": {\n          \"activeBackgroundColor\": \"#005c5c\",\n          \"backgroundColor\": \"#0A8080\"\n        }\n      }\n    },\n    \"formControl\": {\n      \"borderColor\": \"#929292\",\n      \"borderRadius\": \"4px\",\n      \"focusBorderColor\": \"#005c5c\"\n    },\n    \"headings\": {\n      \"h1\": {\n        \"color\": \"#262626\",\n        \"fontSize\": \"32px\",\n        \"fontWeight\": \"500\"\n      },\n      \"h2\": {\n        \"color\": \"#000fff\",\n        \"fontSize\": \"50px\",\n        \"fontWeight\": \"500\"\n      }\n    },\n    \"link\": {\n      \"color\": \"#0a8080\",\n      \"decoration\": \"underline\",\n      \"hoverColor\": \"#005c5c\",\n      \"hoverDecoration\": \"underline\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.symmetry.com/i9/v1/employers/{employerId}/applicationTheme")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"custom_app_theme\": {\n    \"alerts\": {\n      \"borderRadius\": \"4px\",\n      \"borderWidth\": \"1px\",\n      \"variants\": {\n        \"danger\": {\n          \"backgroundColor\": \"#fffbfb\",\n          \"borderColor\": \"#c53336\"\n        },\n        \"primary\": {\n          \"backgroundColor\": \"#fdfcff\",\n          \"borderColor\": \"#006cc1\"\n        }\n      }\n    },\n    \"body\": {\n      \"color\": \"#525257\",\n      \"fontSize\": \"16px\"\n    },\n    \"buttons\": {\n      \"borderRadius\": \"4px\",\n      \"variants\": {\n        \"default\": {\n          \"borderColor\": \"#1c1c1c\"\n        },\n        \"primary\": {\n          \"activeBackgroundColor\": \"#005c5c\",\n          \"backgroundColor\": \"#0A8080\"\n        }\n      }\n    },\n    \"formControl\": {\n      \"borderColor\": \"#929292\",\n      \"borderRadius\": \"4px\",\n      \"focusBorderColor\": \"#005c5c\"\n    },\n    \"headings\": {\n      \"h1\": {\n        \"color\": \"#262626\",\n        \"fontSize\": \"32px\",\n        \"fontWeight\": \"500\"\n      },\n      \"h2\": {\n        \"color\": \"#000fff\",\n        \"fontSize\": \"50px\",\n        \"fontWeight\": \"500\"\n      }\n    },\n    \"link\": {\n      \"color\": \"#0a8080\",\n      \"decoration\": \"underline\",\n      \"hoverColor\": \"#005c5c\",\n      \"hoverDecoration\": \"underline\"\n    }\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "custom_app_theme": {
    "alerts": {
      "borderRadius": "4px",
      "borderWidth": "1px",
      "variants": {
        "primary": {
          "backgroundColor": "#fdfcff",
          "borderColor": "#006cc1"
        }
      }
    },
    "body": {
      "color": "#525257",
      "fontSize": "16px"
    },
    "buttons": {
      "borderRadius": "4px",
      "variants": {
        "primary": {
          "activeBackgroundColor": "#005c5c",
          "backgroundColor": "#0A8080"
        }
      }
    },
    "formControl": {
      "borderColor": "#929292",
      "borderRadius": "4px",
      "focusBorderColor": "#005c5c"
    },
    "headings": {
      "h1": {
        "color": "#262626",
        "fontSize": "32px",
        "fontWeight": "500"
      }
    },
    "link": {
      "color": "#0a8080",
      "decoration": "underline",
      "hoverColor": "#005c5c",
      "hoverDecoration": "underline"
    }
  }
}