Ok just to show what is going to happen once e-os hits stable build.It will be possible to customize virtually everything.
-In order to change the color of the wingpanel as an ADMIN got to /usr/share/theme/elementary/gtk-3.0/panel.css.Inside u will find the line panel background.The value by default will be (#000,07) first value is the color and secoond is the transparency.
--BE CAREFUL!!! Make sure u don`t mess up in here.If u are not sure make a back-up!
-The color of the dock can be adjusted by going to /home/.config/plank/themes/dock.theme
-Since the color here uses css colors u can go here in order to match the color of the dock with the color of plank:[link]
-Notice the color #453 for example is equal to #445533
Another example #752=#775522