There are two ways of getting RGB items, which is through trading or opening the RGB box. 

The RGB items that are currently available in the RGB box are:

• RGB Collar
• RGB Friend
• RGB Sword Rattle
• RGB Headset
• RGB Leash
• RGB Stroller
• RGB Laptop
• RGB Phone Throw Toy
• RGB Propeller
• RGB Monster Truck
• RGB UFO
• Chameleon
• Squid

To obtain an RGB box, you must complete the task on the task board which rewards this item. If you've not got the respective task, you need to reroll your task or continue to complete your tasks and wait for new ones to come in. You can read more about the Task Board here.

There are two tasks which reward the RGB box, as shown on the image below. These are "Make a Neon Pet" and "Make a Mega Neon Pet".

Top Tip: Always have 4 Fully Grown pets on stand-by to complete this task easier. You can use any common pet (which is easy to age) that you don't particularly think is worth trading away.