My first attempt just did not look like the right style for my brother : take 1, so I frogged it and simply chained 312 sts, then sc through the back leg of the “V” on each row to give it that ribbed knitted look.

I just came across a knot in the yarn; actually at the point when the color changes from 4 strands of white to 3 strands of white and 1 strand of gray. I hope that is not how the color transitions throughout ( with knots). I did undo this knot and replaced it with the magic knot as demonstrated in this video by Jane Richmond: How to work the magic knot

After 1” I weighed how much yarn I had left. 127g left of 150g to start with. That means I used 23g for 1”. When using up all of the yarn the scarf should be just under 7” wide.; perhaps 8” after blocking.

Just as I had feared: each color change is accomplished by a big fat knot. I am changing each one to the magic knot which is more flat and less visible.

Total of nine shades.
Yarn has four strands.
WWWW
WWWG
WWGG
WGGG
GGGG
GGGB
GGBB
GBBB
BBBB

W: white
G: gray
B: black

Measurements before blocking:58”x6.5”
Measurements after blocking: 62”x8.5”

I took great care with the blocking, feeding the blocking wire through each one of the 312 stitches on each side and smoothing out the fabric to the best length and width.
Now the scarf just needs to dry and wait for its recipient to come visit this summer and take it home with him.
It is looking fabulous!