For this sample I follow the instructions for the one-color crossed brioche stitch
and changed colors every 2 rows.
m1 = make 1 st by bringing working yarn under needle to front then
over needle to back

To begin, loosely cast on (long tail over 2 needles) a multiple of 3 sts plus 2 selv
sts. My colors: color A = orange, color B = brown

Prep Row 1 RS: selv st, *sl 1 pwise wyib, m1, k2tog; rep from *, end with
selv st.
Prep Row 2 WS: selv st, k1, *sl the yo pwise wyib, m1, k2tog; rep from *,
end with sl the yo pwise wyib, m1, k1, selv st.
Row 1: selv st, k1, *sl the first yo pwise wyib, m1, brk1 (by knitting
the 2nd yo with the foll st); rep from *, end with selv st.
Repeat Row 1.

For this sample I again followed the instructions for the one-color crossed brioche stitch (see above) but changed colors every row, alternating between three colors. My colors: color A = orange, color B = brown, color C = steel blue