Please note there is no set that matches the first three photos - Morning Mist & Nebula Frost come close.
Ephemeris is an asymmetric-shaped triangle, worked sideways. It consists of simple garter stitch coupled with a mosaic pattern and a simple slipped stitch repeat. Only one colour is worked per row for both the mosaic and slipped stitch patterns. The yarn not-in-use is carried up the side of the shawl throughout the pattern. The shawl can be easily enlarged or shortened by adding or subtracting rows of garter in the last section before binding off.
The shawl is knit using two skeins of Practicality 75/25 and it is shown in the close up (4th) photo in Morning Mist and Nebula Frost.
You can create your own combination by choosing two different skeins of Practicality 75/25.
For a complete list of current colorways available, please see Scrumptious HT.