To select all objects of the same type or color in the graphics window

Select Home tab > Select & Edit panel > Select > Select by Color/Type to open the Select by Color/Type dialog.

Use one or more of the options to control which entities are selected:

Color — To select entities of a particular color, select the color in the menu.

Entity Type — To select all entities of a particular type, select the type in the menu.

Hole Depth — To select all holes of a particular depth, first select a type of hole in the Entity Type menu, then enter the Hole Depth Value, and a Tolerance for how close to the Value the depth must be.

Hole Diameter — To select all holes of a particular diameter, first select a type of hole in the Entity Type menu, then enter the Hole Diameter Value and a Tolerance for how close to the Value the diameter must be.

Tip: Select an entity in your part before opening the dialog to pre-populate the fiel

The link below shows how to select by color: