Engine oil color

[Dad's72]

Okay, I have a strange situation and question. I changed my oil in my 2015 Silverado LTZ 5.3 and after driving home I checked the fluid and noticed it was just over the line. It was about a quarter of a quart over full. I crawled under it and drained a little bit. To my surprise the oil was dark in color. The oil I used was Mobile 1 full synthetic. I only drove like 50 miles before draining it out. What do y'all think? Is this normal? It was about the color of maple syrup and smelled and felt fine.
Note: I drained more to check the smell and color.