IATF arenas have 4 throwing lines:
These lines must be painted on the grounds of all IATF members venues to ensure throwing distances and safety regulations are properly followed.
The Red Line
The Black Line
The Blue Line
The Yellow Line (Perimeter Line)
Image 4.3-A (Section 4.3):
The following diagram represents a bird’s eye view of a single axe throwing lane, with all the lines painted on the ground. All measurements are taken from the back of the plywood backboard as if it reached all the way to the ground.