[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [DOM](./puppeteer.protocol.dom.md) > [RGBA](./puppeteer.protocol.dom.rgba.md) > [a](./puppeteer.protocol.dom.rgba.a.md) ## Protocol.DOM.RGBA.a property The alpha component, in the \[0-1\] range (default: 1). Signature: ```typescript a?: number; ```