os-rel-design rectangle issue

**Describe the bug**
The rectangle option of the os-rel-design (https://pullrequest.co.il/os-rel-design) doesn't work properly - background is not pink as the squared one.

**To Reproduce**
switch to the rectangle background and you'll see the background is grey and not pink.

**Expected behavior**
The background should be pink, same as in the squared background option.

@InbarDanieli 
