A new installation of NinjaTrader 8 has the "Slate Gray" skin set by default.
1) Open NinjaTrader 8. From the Toolbar
Click on:
Tools > Options
2) In the "General" Category
Goto:
General > Properties > Preference >
Skin
Select a skin type from the dropdown list.
Click OK
3) Restart Required
Click OK
4) Start NinjaTrader 8
Start NinjaTrader to see the skin change take effect. This is the "Light" Skin.