indoors, artificial light
(It was sunny all day today! I could hardly believe it.)
The last picture is most color-accurate - the second is a darker than Butter usually appears, even when in the shade, and the first has a slightly greenish cast that I've never seen in person. I really don't have much else to say about this one. It's a pretty color, but there are a lot of similar colors, so if you have a pale yellow with a reasonably good formula, you probably don't need Butter.