Euclid red-green-blue image of the Perseus cluster made by combining the images taken through the three NISP filters. The solid coloured lines show the extent of the two Spitzer/IRAC datasets, with the cyan and magenta lines showing the extent of the first and second pointings, respectively. The images have been aligned with the WCS coordinate system, with north up and east to the left. In the low-right corner, a scale bar representing 5 arcmin is shown.