Photoshop Workflow

From top to bottom:

Books: Desaturate, Levels-RGB-0-0.63-255

 

Lockers:

Levels: RGB-56-0.91-255, Red-0-1-241, Blue 0-1-193

Unsharp Mask: 100%-25-0

 

Orca: Hues-Blues +42, Yellows +170

 

Tiles: Hues- RGB -17

Levels- Greens 0-1.18-255, Blues 0-1.23-255

Unsharp Mask 37-49.8-0

 

Tree: Brightness -96

Levels: R-0-1.28-255, G-0-1.10-255, B-0-1.34-255

 

Bottle caps: Hues:

Reds +97, Yellows +114, Greens +126, Cyans +119, Blues +106, Magentas -33

Done