Cable Stitch

Hi everyone, can you only do cable stitch in one color? I switched colors and I can see the new color on the purl stitch only…
R1 &3 (RS) K3,P5,K6,P5,K3
R2 and all (WS) K8,P6,K8
R5 K3,p5, slip 3 to cable needle hold in back, K3,K3 from cable needle P5, K3
R7 Rep R 1
R8 Rep R 2
Thanks Cheley