One-Color Half Brioche Stitch
This stitch is a combination of brioche and normal ribbing.Half Brioche – RS                                                               Half Brioche – WS

Cast on an even number of sts.
Row 1 WS: *sl1yo, k1; rep from *.
Row 2 RS: *p1, brk1; rep from *.   
Repeat Rows 1-2.

Two-Color Half Brioche Stitch
Use either circular or double-pointed needles to avoid having to cut threads.
This stitch works up to a beautifully firm fabric and not as thick as the plain brioche stitch.
It should be worked on needles smaller than those recommended for the yarn.
My colors: LC = ecru, DC = grey.

Two-Color Half Brioche – DS                                             Two-Color Half Brioche – LS

Loosely cast on an even number of sts in color A. 
Do not turn work, slide to other end of needle and attach color B. 
Set-Up Row DS DC: *sl1yo, k1; rep from *. Turn work.
Row 1 LS LC: *p1, brk1; rep from *. Do not turn, slide. 
Row 1 LS DC: *p1, sl1yo; rep from *. Turn work.
Row 2 DC LC: *brp1, k1; rep from *. Do not turn, slide. 
Row 2 DS DC: *sl1yo, k1; rep from *. Turn work. 
Rep from Row 1 LS LC.