curl --request PUT \
  --url https://api.loyalty.dog/v2/giftcards/merchants/theme \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "presetId": "eposn-default",
  "primary": "#15803d",
  "primaryFg": "#ffffff",
  "sidebarBg": "#ffffff",
  "sidebarText": "#4b5563",
  "sidebarActiveBg": "#f0fdf4",
  "sidebarActiveText": "#15803d",
  "sidebarBadge": "#15803d",
  "background": "#f9fafb",
  "foreground": "#111827",
  "surface": "#ffffff",
  "border": "#e5e7eb",
  "muted": "#6b7280",
  "logoUrl": "<string>",
  "logoAlt": "<string>",
  "fontFamily": "<string>",
  "borderRadius": "lg"
}
'

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    presetId: 'eposn-default',
    primary: '#15803d',
    primaryFg: '#ffffff',
    sidebarBg: '#ffffff',
    sidebarText: '#4b5563',
    sidebarActiveBg: '#f0fdf4',
    sidebarActiveText: '#15803d',
    sidebarBadge: '#15803d',
    background: '#f9fafb',
    foreground: '#111827',
    surface: '#ffffff',
    border: '#e5e7eb',
    muted: '#6b7280',
    logoUrl: '<string>',
    logoAlt: '<string>',
    fontFamily: '<string>',
    borderRadius: 'lg'
  })
};

fetch('https://api.loyalty.dog/v2/giftcards/merchants/theme', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.loyalty.dog/v2/giftcards/merchants/theme"

payload = {
    "presetId": "eposn-default",
    "primary": "#15803d",
    "primaryFg": "#ffffff",
    "sidebarBg": "#ffffff",
    "sidebarText": "#4b5563",
    "sidebarActiveBg": "#f0fdf4",
    "sidebarActiveText": "#15803d",
    "sidebarBadge": "#15803d",
    "background": "#f9fafb",
    "foreground": "#111827",
    "surface": "#ffffff",
    "border": "#e5e7eb",
    "muted": "#6b7280",
    "logoUrl": "<string>",
    "logoAlt": "<string>",
    "fontFamily": "<string>",
    "borderRadius": "lg"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "theme": {
    "presetId": "eposn-default",
    "primary": "#15803d",
    "primaryFg": "#ffffff",
    "sidebarBg": "#ffffff",
    "sidebarText": "#4b5563",
    "sidebarActiveBg": "#f0fdf4",
    "sidebarActiveText": "#15803d",
    "sidebarBadge": "#15803d",
    "background": "#f9fafb",
    "foreground": "#111827",
    "surface": "#ffffff",
    "border": "#e5e7eb",
    "muted": "#6b7280",
    "logoUrl": "<string>",
    "logoAlt": "<string>",
    "fontFamily": "<string>",
    "borderRadius": "lg"
  },
  "validation": {},
  "performance": {
    "cssVarChanges": 123,
    "hasCustomFont": true,
    "hasLargeLogo": true,
    "issues": [
      {
        "severity": "<string>",
        "code": "<string>",
        "message": "<string>",
        "estimatedMs": 123
      }
    ],
    "score": 123
  }
}

{
  "error": "<string>",
  "issues": [
    {
      "field": "<string>",
      "severity": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ],
  "warnings": [
    {
      "field": "<string>",
      "severity": "<string>",
      "code": "<string>",
      "message": "<string>"
    }
  ]
}