Here you can review and edit the current theme colors. Once you like your color settings simply select the copy to clipboard and paste it into an email for your developer.
Once the developer receives this email. It is a simple matter matter to incorporate the edited color scheme as a new or revised one. *** Warning the edited color theme is not saved anywhere, thus after you reload the browser the edited version of the theme will no longer be present. This also an easy way to abort/abandon the color scheme. ((f5) will reload the browser).