[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Overlay](./puppeteer.protocol.overlay.md) > [HighlightFrameRequest](./puppeteer.protocol.overlay.highlightframerequest.md) > [contentOutlineColor](./puppeteer.protocol.overlay.highlightframerequest.contentoutlinecolor.md) ## Protocol.Overlay.HighlightFrameRequest.contentOutlineColor property The content box highlight outline color (default: transparent). Signature: ```typescript contentOutlineColor?: DOM.RGBA; ```