The blue for the sea, green for the hills, gold for the gorse, purple for the heather and white for cottages.
The new "hunting tartan" claims this for its theme:
Dark Grey: The rocks, the heart of Ellan Vannin
Grey Green: Her rugged valleys, hills and moors
Clear Blue :The sky above the land of Mannin
Grey Blue: The sea around here shining shores
Bright Gold: The gleam of cushag flowers a-blowing
Pure White: The mist that lingers for a while