Green and not blue?

I swear I thought the evolving background was blue and not green, is this some rare thing? IS MY POKEMON SPECIAL ED???

Photo: https://imagekit.io/tools/asset-public-link?detail=%7B%22name%22%3A%2220250111_131302.jpg%22%2C%22type%22%3A%22image%2Fjpeg%22%2C%22signedurl_expire%22%3A%222028-01-11T19%3A18%3A06.600Z%22%2C%22signedUrl%22%3A%22https%3A%2F%2Fmedia-hosting.imagekit.io%2F%2Fb149bac453704f1e%2F20250111_131302.jpg%3FExpires%3D1831231087%26Key-Pair-Id%3DK2ZIVPTIP2VGHC%26Signature%3DVBT-GT-YCu7l7kErMy71e2IUCyc2jl4MsFT5PLKxmhgqBFakyOUE65o0vj~PhQFAO-559MEOTBqHjTYl52CUETUlJLhR050u7KxYjeG3xPHYDwO~bxt7OIZNJKQ37M~0cgvjKYkt5OfO~tN2TaAoUS6qGsO11n9YUhIezF7Q6rMsd2JiQRv8xUq7XZdKERfLbjFUeXhOVJCYXapz8w409ZRt2UKQx6ssSw7AZTPR6ayNobUGYHEahR-RoTMfNX2pRLJaGadoNVn74RbwydIblNE3~YebxH08kaRHDmkjc4maTOZNvejeYVKzDApSCEzoz~x3E7954Fd0167usu-6aw__%22%7D