It seems that it's normal for color variation among eggs in the same clutch. From Amy's blog of March 20, 2023:
https://www.raptorresource.org/2023/03/20/egg-colors-and-shapes/"Egg Colors
Where do egg colors come from? Once a bird’s egg enters its shell gland or uterus, it is plumped with water and covered with calcium carbonate, a chalky white substance that forms the egg’s hard shell. In birds that color their eggs, pigments mix with the last layers of calcium carbonate to form the egg’s ground color. Blotches, spots, streaks, and squiggles are applied as the egg presses against a layer of epithelial cells in the shell gland, causing them to release or squirt pigment on the developing shell. If the egg is stationary or moving very slowly, it will be solid, blotched, or spotted. If the egg is in motion, it will be streaked. And if the bird was startled during pigment deposition, the egg might have a distinct pale or uncolored band around its middle."
P.S. to STLbf - I'm also a Hoosier, from Indianapolis.