In the Save for Web window (if you are using Save for Web export), try to tick the option "Convert to sRgb".
If with that option you still have unmatched colors when uploading here, try adding the second changes, in the Color Settings tab, i've made a printscreen with my settings and steps. (i'm using CS6 version, but hope the settings will match with CC).
https://i.imgur.com/XjOCJUo.jpg