Minecraft

For this achievement you need 16 different colors of wool. Some of these wools are easy to get while others are a little tricky. The majority of this will require white wool and bone meal so shear a bunch of sheep and kill skeletons so you have plenty of items when doing this.

1. White Wool

Shear a white sheep
Or
Have 4 pieces of string

2. Red Wool

Get a red flower to create red dye. Combine with white wool to create red wool.
*Have a few extra red dyes for the other wools

3. Yellow Wool

Get a yellow flower to create yellow dye. Combine with white wool to create yellow wool.
*Have a few extra yellow dyes for the other wools

4. Orange Wool

Combine red dye with yellow dye for orange dye. Combine orange dye with white wool for orange wool.

5. Blue Wool

You will need 1 Lapis Lazuli which is underground. combine it with white wool for blue wool.
*Have a few extra Lapis Lazuli for the other wools

6. Black Wool

Shear a black sheep
Or
Get an Ink Sac from a squid. Combine it with white wool for black wool.


7. Brown Wool

Shear a brown sheep
Or
Find a cocoa bean. They are normally found in jungle biomes. Combine it with a white wool to make a brown wool.

8. Green Wool

Destroy a cactus that resides in the desert. Heat it in a furnace for Cactus green. Combine it with white wool for Green Wool.
*Save a couple extra cactus green for other wools

9. Lime Wool

Use some of the cactus green from the last one and combine it with bone meal to create lime dye. Combine the lime dye with white wool to create lime wool.

10. Cyan Wool

Combine Lapis Lazuli with cactus green to make cyan dye. Combine cyan dye with white wool to make cyan wool.

11. Gray Wool

Shear a gray sheep
Or
Combine an Ink Sac with bone meal to make gray dye. Use that and combine it with white wool to create gray wool.

12. Light gray Wool

Shear a light gray sheep
Or
Combine the gray dye you just made on the previous one (you get 2 dyes) with bone meal to get light gray dye. Use that and combine it with white wool to create Light gray wool.

13. Light blue Wool

Combine a lapis Lazuli with bone meal to make light blue dye. Combine it with white wool to create light blue wool.

14. Pink Wool

Combine red dye with bone meal to make pink dye. Combine it with white wool to create pink wool.

15. Purple Wool

Combine a red dye with lapis lazuli to make purple dye. Combine it with white wool to make purple wool.

16. Magenta Wool

*There are a few different ways to make magenta dye. Either option will still get you the dye but will yield different quantity.

Combine 1 purple dye with 1 pink dye = 2 magenta dye

Combine 1 pink dye with 1 red dye with 1 lapis lazuli = 3 magenta dye

Combine 1 bone meal with 1 lapis lazuli with 2 red dye = 4 magenta dye

Once you have your dye, like the others combine it with white wool to make magenta wool.






When you have created all 16 different colors your achievement will unlock. Unfortunately loading a previous save with all of the 16 wools premade didn't unlock for me, even having all of them in my inventory. You have to create them all over again. If there is anything I missed please let me know so I can change it.

In order to obtain all 16 colors of wool, you'll first need to obtain 16 dyes in order to dye the wool. Any color of wool can be dyed any other color, for example: you can dye White Wool to be Orange Wool, or Purple Wool to be Green Wool, etc.

Heres all the ways to obtain all the different types of Dye! (Compiled from the Minecraft Wiki)

White Dye
-Crafted from Bone Meal.
-Crafted from Lily of the Valley (Flower)

Light Gray Dye
-Crafted from Black Dye + 2x White Dye
-Crafted from Gray Dye + White Dye
-Crafted from Azure Bluet, Oxeye Daisy, or White Tulip. (Flowers)

Gray Dye
-Crafted from Black Dye + White Dye

Black Dye
-Crafted from Ink Sacs
-Crafted from Wither Rose (Flower)

Red Dye
-Crafted from Beetroot
-Crafted from Poppy, Red Tulip, or Rose Bush (Flowers)

Orange Dye
-Crafted from Red Dye + Yellow Dye
-Crafted from Orange Tulip (Flower)

Yellow Dye
-Crafted from Dandelion, or Sunflower (Flowers)
-Obtained from Village Mason's chest

Lime Dye
-Crafted from Green Dye + White Dye
-Obtained from Smelting Sea Pickles

Green Dye
-Obtained from Smelting Cactus
-Obtained from Desert Village House chests

Light Blue Dye
-Crafted from Blue Dye + White Dye
-Crafted from Blue Orchid

Cyan Dye
-Crafted from Blue Dye + Green Dye

Blue Dye
-Crafted from Lapis Lazuli
-Crafted from Cornflower (Flower)

Purple Dye
-Crafted from Blue Dye + Red Dye

Magenta Dye
-Crafted from Purple Dye + Pink Dye
-Crafted from 2x Red Dye + Blue Dye + White Dye
-Crafted from Pink Dye + Red Dye + Blue Dye
-Crafted from Allium, or Lilac (Flowers)

Pink Dye
-Crafted from Red Dye + White Dye
-Crafted from Pink Tulip, or Peony (Flowers)

Brown Dye
-Crafted from Cocoa Beans


(NOTE)
-Wandering Traders can also have random Dyes for sale for 3 emeralds.


Okay, now that you know all the ways to obtain all 16 dyes, you just need to craft them with any piece of wool. Wool is obtained by killing, or shearing sheep. It can also spawn naturally in the world around Villages and Pillager Outposts.

edit: Wool can also be crafted with 4 string.

If I were you, id clear your inventory and hold one of each piece of wool in your inventory. Then, after you've obtained all 16 colors, your achievement should pop!