Customize UI Style Tokens
The ACC UI is rendered inside an iframe. Custom CSS outside the iframe cannot style the ACC UI interior. To customize the interface, map standard styling rules by using the styleTokens object within your agentforceClientConfig. Style tokens are passed as strings. CSS color values, pixel values, and other CSS properties are all string values.
Because the Agentforce Conversation Client Web SDK is currently in Beta, supported style tokens are updated frequently. To ensure you use the most current token names and values for headers, message bodies, and input areas, refer directly to the salesforce/agentforce-conversation-client NPM Repository. Do not use hardcoded styling specifications in production without verifying them against the latest package release.