This is a simple port of https://github.com/alexvandesande/blockies to a react component.
import Blockies from 'react-blockies';
export const myBlockies = () => (
<Blockies
seed="Jeremy" {/* the only required prop; determines how the image is generated */}
size={10} {/* number of squares wide/tall the image will be; default = 15 */}
scale={3} {/* width/height of each square in pixels; default = 4 */}
color="#dfe" {/* normal color; random by default */}
bgColor="#ffe" {/* background color; random by default */}
spotColor="#abc" {/* color of the more notable features; random by default */}
className="identicon" {/* optional class name for the canvas element; "identicon" by default */}
/>
)