Holland Red/Charcoal Concrete Paver (Common: 8-in x; Actual: 7.75-in x 3.88-in) – $0.25 @ Lowes

https://www.lowes.com/pd/product/3010214
Ideal to overlay or create a new patio or walkway
Subtle blend of red and charcoal color tones
Classic, easy-to-install rectangular shape