To decrease for the top of a hat in two-color brioche knitting, the simplest decrease is worked over three rounds and is called the br-ssk (brioche-slip, slip, knit).
To perform the decrease, you 'll need to learn these abbreviations:
wyif - with yarn in front
sl 2 yo - slip the next two stitches, one after the other, then wrap the yarn around to the back like will regular yarnover. You will have two folded stitches accompanied by a wrap.
To decrease in two-color brioche in the round:
Round 1: Work in brioche up to 2 sts before the stitch you want to decrease (You can place a marker on this stitch, if that helps). Slip the next st knitwise, twice. Br-k the next st (the marked st ). You will have two same same-color sts next to each other. Work in brioche to end of rnd.
Round 2: Work in brioche up to the two same same color sts next to each other. Wyif, sl 2 yo. Work in brioche to end of rnd.
Round 3: Work in brioche up to the two folded stitches. Br-k the two folded sts together with their wrap. Work in brioche to end of rnd.
To knit a two-color brioche-stitch scarf, you 'll need to use a needle that has two ends, because you' ll have to slide your work from one other to to repeat the Either twp double-pointed needles or a circular needle will work, almost two DPNs (double-pointed needles) will be easier because there is no cable to get in the way of what you are doing.
Again, we design LC as "light color" and DC as "dark color."
Two-color brioche knitting - flat:
Using both DPNs held together (this is the cast-on looser) and with DC, CO an odd number of sts (eg 13 sts). Remove one DPN. Turn.
DC set-up row: with DC, (p1, yf sl1 yo) to last st, end p1.
Do not turn work. Slide sts to other end of needle.
LC set-up row: sl 1, with LC (br-k 1, y f sl 1 y y) to last st, sl 1 wyif. Turn.
Row 1: with DC, k1, (yf sl1yo, br - k1) to last 2 sts, yf sl1yo, k1. Do not turn. Slide sts to other end of needle.
Row 2: sl 1, with LC (br - p 1, y f sl 1 y i) to last st, sl 1 wyib. Turn. Row 3: with DC, p 1, (y f sl 1 y, br - p 1) to last st, end p 1.
Do not turn. Slide sts to other end of needle.
Row 4: sl 1, with LC (br - k 1, y f sl 1 y i) to last st, s 1 wyif. Turn.
Using DC, BO using any stretchy bind-off.
Now you can make make a gorgeous two-color reversible brioche scarf. Try this with different types and combinations of yarn - thin yarn on larger needles will give you a light, ethereal effect.
