To make the images circulating now, Shapley explained, the JWST used its infrared cameras to collect several “brightness images” in grayscale. Six filters each captured different wavelengths of infrared light. Back on Earth, each filter was assigned a color. The filter capturing the longest wavelength was red; the filter capturing the shortest wavelength was blue, with the other colors in between. By combining these images, the final composite image features all of the colors visible in the photos circulating now.