I agree with Annie, this semp is a real color shifter. I have the same plant/source growing in two beds, one is partial shade, the other full sun. I will try to take photos today. Even in the full sun there can be varied results on color, depending on which side of the colony is getting the most sun (south side of colony, or north side of colony). That is one of the things I find so interesting about this cultivar. And yes, in August here is is a chartreuse/green that I find lovely.
Soil does make a huge difference, as does weather, sun, moisture, etc.