Orange against grey sky is often a daft choice. I think course setters should have enough experience to stop any really tricky contrast issues. It’s their job. Like knowing where the sun will be (even if it’s cloudy when they set it up). Pointing that out got me banned from one ground..
The way the light hits clays at different times of day makes a big difference. I recall shooting (the much missed) Weston wood twice on a summers day. No problems, but the second round after lunch was barely recognisable as the same course.