These are not completely opaque. They're comfy and fit well though. Completely fine for wearing under dresses, but definitely not substantial enough to wear as pants on their own.
The color of these leggings was just what I was looking for! The wide waistband did make these very comfortable. My only complaint is that the leggings are way too long for me, but since I'm only 5'1", this probably wouldn't be a problem for everyone.
I now own three of these leggings and they are the best! I'm 5'10" and the large fit me great as these leggings are long enough unlike most others. They stay soft after many washings. If you want them to last a realllllly long time, hang dry them. I love the wide waste band as it doesn't leave marks after a day of wearing these unlike leggings with a narrow waist band. And they don't shrink. Very comfy!