A simple component that wraps freeman-lab/pixel-grid.
npm install react-pixel-grid
import PixelGrid from "react-pixel-grid";
<PixelGrid
data={Array(64).fill(0).map(Math.random)}
options={{
size: 10,
padding: 2,
background: [0, 0.5, 1],
}}
/>
const r = "#f00";
const g = "#0f0";
const b = "#00f";
const x = "#000";
<PixelGrid data={[
x, r, x, g, x, b,
r, x, g, x, b, x,
x, r, x, g, x, b,
r, x, g, x, b, x,
x, r, x, g, x, b,
r, x, g, x, b, x,
]} />