This version of Unity is unsupported.
Removed

Physics2D.colliderAsleepColor

Obsolete Physics2D.colliderAsleepColor is deprecated. This options has been moved to 2D Preferences. public static Color colliderAsleepColor;

Description

The color used by the Gizmos to show all asleep Colliders (Collider is asleep when the body is asleep).

This is only used in the Editor to control Gizmo options.