color.
The circle shapes in this print should each measure approximately ~1.8 inches (4.6 cm) in diameter. These measurements are for fabric products. Measurements are doubled when printed for wallpaper. The vibrant shade of red in this print is called "Vivid Red" and can be found on the official Spoonflower colormap in essentials with the hex code "E0201B". This color will coordinate well with a variety of other designs in the "Vivid Red Color Coordinated Collection". The black in this design is just jet black with the hex code "000000".