SHift-X sets the color value directly, bypassing clamping done on the RNA level. The color picker uses RNA setter to assign colors, which enforces limits. This change makes it so the 0..1 is an UI range, but allows to manually type in values above that. This is similar to colors in the node trees, but a bit more conservative by using UI range explicitly. Thanks Omar for identifying the root cause of where the clamping is coming from! Pull Request: https://projects.blender.org/blender/blender/pulls/124355