Same examples of unique pillow at this post may become your inspiration. All use glossy fabric as accent. Some of them use patchwork technique as accent and one using transparent ribbon.

This yellow pillow has the common shape as other pillow but you can see the inserted ribbon flower at the pillow niches. You can use transparent ribbon like organdy for it.

This pillow has emboss square shape at its surface. It is also using roll stitches at some part of square accent. As usual, you should match the color with your home interior.

This pillow uses patchwork as accent. Use the same color with your chair or sofa. This model of pillow is suitable with your plain sofa like pictures.