Skin update issue

We are trying different color schemes in Marist using tenant admin skinning page, when trying to edit "Primary clip background gradient primary color"  to rgb(84,84,84) and "Primary clip background gradient secondary color" to rgb(0,0,0) it says "Skin saved.The skin has been successfully saved." when clicked on "save" button .  But values are actually not being saved. If I refresh the page and see the values are still same old values before change. However it is letting me to change to another values other than these values which I mentioned above.

 Also if I try to use "revert to original value" button rather than those colors, it changes the color in the selection to default values which are same as mentioned above but when I click save it says "Skin not saved.The skin could not be saved successfully."