Well, I think it would depend on the seller. If you bought them at a nursery, or garden center of Lowes, Wal-mart etc., they were probably tissue cultured, and may never be "quite right"
And, it often takes a daylily a year or two to "settle in" and bloom normally.
If you bought from a daylily specialty garden, that divides plants to get divisions to sell, then they might have sent the wrong plant. However, if you live where it has been hot and dry, the blooms might be pale, and smaller. I know some of mine are pale this year.
Also, photos are usually taken in early morning, when the flowers are fresh. Daylilies can "melt" in the sun and heat, especially reds, deep rose, purples. Yellows, peach and gold fair much better in the sun and heat. So you might look at them before 9 a.m., if you have been looking at them in the evening, say after work.
If you still have the names, look them up in our database. Maybe others have posted photos you can compare your blooms to. Sometimes sellers enhance photos so much, the flowers will never look that good. Most of the images in our database were taken in the average garden, so can be more reliable for color.